Hi, Cassie! You have so many current projects (Tales from the Shadowhunter Academy, The Dark Artifices, The Last Hours, Magisterium), that it’s really hard to keep track of all of them. I know you don’t have set release dates for most of them, but could you please make an updated timeline of the book order, and when they might possibly be coming out? I can’t wait to read Lady Midnight! — buffylives

Sure. I went ahead and updated the timeline I posted earlier below, to reflect Shadowhunter Academy.

brookeelizaxo said: Hi Cassie! I love your books so so so sooo much! I finished City of Heavenly Fire and it was amazing. I was wondering when the rest of your novels were being released (TDA, TLH, TWP, etc)? Are there set dates or years for the releases? Thank you for such wonderful series! :)

Shadowhunter Chronicles:

City of Heavenly Fire wrapped up the Mortal Instruments series. The next installment of the Chronicles is The Dark Artifices, which takes place five years after CoHF. You can read about them here.

There are three Dark Artifices books: Lady Midnight, Lord of Shadows, and Queen of Air and DarknessLady Midnight is tentatively scheduled for release in late 2015 though it is not definite yet.

The Last Hours, the sequel series to The Infernal Devices, begins publishing shortly after Lady Midnight. You can read about it here. It’s about the children of the Infernal Devices characters.

Tales from the Shadowhunter Academy is a sort of follow-up to the Bane Chronicles, in that it is 10 e-book stories that follow Simon from his arrival at the newly re-opened Academy in Idris for Shadowhunter training to the day he Ascends. You can read about it here.

So the order of books is:

The Bane Chronicles print edition, November 11, 2014

Tales from the Shadowhunter Academy, starting early 2015

Lady Midnight (The Dark Artifices 1)

Chain of Gold (The Last Hours 1)

Lord of Shadows (The Dark Artifices 2)

Chain of Iron (The Last Hours 2)

Queen of Air and Darkness  (The Dark Artifices 3)

Chain of Thorns (The Last Hours 3)

That carries us through for quite a few years, so other than saying that the Shadowhunter Chronicles is intended to wrap up permanently with an installment called The Wicked Powers, I think that’s all I can say right now.


The Iron Trial, the first book in the Magisterium series, came out September 9, 2014. There will be an installment of Magisterium every September for the next four years.

The second book, The Copper Gauntlet, is scheduled for September 2015.

Hope that helps!

commanderfraya said:  I just finished City of Heavenly Fire and I was struck by Ty’s character. I don’t know if you intended for him to be autistic or not, but given the behaviors described — his stimming/counting, expanded vocabulary, difficulty communicating, agitation, aversion to touch, and other sensory issues — he’s one of the best autistic representations I’ve ever seen, even if his character wasn’t originally intended that way. My younger brother and fiancee are both autistic, and it’s really difficult to find humanizing depictions of autistic people in media… If Ty is going to be a continuing character in The Dark Artifices then I’m all kinds of excited, and if not then I’m glad we got to know him in Heavenly Fire! Your work has meant a lot to me since I was thirteen years old, thank you for sharing your imagination and I hope you have a lovely day :)

Hi! I just wanted to post this to assure you that Ty is absolutely going to be a continuing character. He’s very significant in the Dark Artifices. He is important to the other characters, and they are important to him. 

Ty is a challenge because it’s a challenge to write a neuroatypical character in a world in which there are no words for neuroatypicality and no acknowledgement that it exists. I am grateful that so many readers have identified Ty as a person with autism even though I never used that word —largely readers who have autism themselves or know someone with autism.

There is no one way that people with autism behave or feel or are. I can only say that Ty is loving and great and very much himself. Ty is based in part on my stepbrother, who has autism, and shares several traits with Ty, though not all of them. His name isn’t Ty, for instance. It’s Will. :)



After reading the COHF prologue excerpt, I have the sense that Ty has Asperger’s Syndrome. Can you confirm this? I think that would be really cool because I’ve also dealt with Asperger’s in my life (it being the worst when I was about Ty’s age) so seeing you create a character also going through that is really assuring, for lack of a better word. Thanks so much if you can answer! ➰ — malec-chat

Hi Cassie, I love your books and I cannot wait for COHF. You are an amazingly talented author on and I have fallen deeply in love with your writing. Unfortunately I shall have to wait a while for the book, but in the mean time I have been satisfying my shadowhunting needs with #TMItuesday. I have just read the new snippet from the prologue and was wondering if Ty was autistic. I have family who work with autistic children and in the snippet and noticed Ty was showing a few autistic traits, so I was wondering whether or not he was autistic? — letmeliveinbooks
Yes, Ty places on the autistic spectrum. I’m glad that that was picked up as it is a part of his character. My stepbrother is autistic (I know there is debate within the neuroatypical community as to whether to say “autistic” or “person with autism” so I try to go with what people want to call themselves) and it is partly through that relationship that I decided that I would like to write a neuroatypical hero. Ty has a loving and supportive family but certainly lives within a society that is intolerant of difference, and which has a specific poor relationship with neuroatypicality among its members. Ty is a favorite of mine and a big part of TDA. I wanted to make it clear that he was just as intelligent and skilled, and just as worthy and capable of love, respect and admiration as his neurotypical peers, when he is struggling and when he is not, and I hope you will like him.

TDA snippet

“Do I?” Diana leaned back in her chair, tapping her pencil against the back of her right hand, where the Rune of Sight was inked. Every Shadowhunter had a Voyance rune on their dominant hand, allowing them to see through glamours. Emma’s was on her left. “Well, if I know what you did, and you know what you did, maybe you should tell me what your punishment should be?” 

“I should have to take care of a box of kittens,” Emma said immediately. “Definitely a box of kittens. You know how cruel kittens are, with their tiny little claws and terrible attitudes.”

TLH Snippet

about the Dark Artifices, are Jem and Tessa going to play a similar role to Will and Tessa in the Last Hours? I really enjoyed reading about the relationship in the Infernal Devices and the snippet in Heavenly Fire. I know you said in a previous post about how letting go of characters is a part of life, but JESSA. You’re amazing, your books are amazing, and Jem Carstairs is amazing. - Lily — falling-into-rain


I would say they play very different roles because Jem and Tessa are not the parents of anyone in The Dark Artifices.

Yes, Jem is distantly related to Emma through his uncle Elias, but neither he or Tessa are the parents of any of Our Heroes in TDA. They don’t even look old enough to be any of their parents. They have a more, I don’t know, almost Magnus-y role.

By contrast Will and Tessa are James and Lucie’s parents. They are obviously enormously bound up in their lives, love them enormously, and are people who James and Lucie spend their lives comparing themselves to and seeking approval and love from. They are also a generation older than them. Their friends are Jem and Gideon and Cecily and Gabriel and Sophie and Charlotte and Henry. Their kids are their kids, not so much their compatriots.

It’s known that Tatiana Blackthorn (nee lightwood) is the antagonist in TLH. I was just curious, if she still remained close to Gabriel and Gideon, and if she ever even attend their weddings? (Is this also when she started to plot her “revenge”?) — dumbledorelovessherbetlemons

Well, she is an antagonist. She may not be the only one. And she did not remain close to Gabriel or Gideon. She hates them.

Hi Cassie, I can’t wait for TLH and I would like to know what kind of relationship there’s between Lucie and Matthew? :) — warlockintothetardis

Lucie adores Matthew. He’s her brother’s parabatai. Everyone loves Matthew. He’s one of those people. Snippet:

Matthew held out his hands. “Pax,” he said, wheedlingly. “Let it be peace between us. You can pour the rest of the port on my head.”

James’ mouth curved up into a smile. It was impossible to stay angry with Matthew. It was almost impossible to get angry at Matthew. 

hot boys in books

Hello again Cassandra! I don’t know if you remember, but I sent a fan mail a few days ago. But this one is on behalf of my sister (who sadly doesn’t have a tumblr.) I showed her one of your comments (from Twitter, I believe) saying that Julian was going to be a “sex god” and he was basically going to be hotter than the other boys. (Including the fantabulous William Herondale, who I love!) So basically her question is how?! She is a huge Jace fan, and she doesn’t believe that anyone can be better than him, so she wants to know how will Jules be hotter. Thanks and much love, Ashley P. (The Doctor’s Shadowhunter from 221b) — thedoctorsshadowhunterfrom221b

First I should say: I was joking about the sex god thing. I think someone asked me if Julian was going to be a sex god and I said yes. But mostly because I was being silly and also because I don’t think I’d say “no” about any of my characters except the evil ones. Sometimes even the evil ones. Sex God Status is almost entirely in the eye of the reader. These are book characters, they live on the page: they look how you imagine they look. What you love about them is their characterization, and each character is different. It is down to the preference of the reader who they find sexiest.

I’m glad you mentioned Will because there is also a thing I think of as New Character Syndrome. Before you have met a character — as in read a substantial amount of a book about them — you can’t imagine how you will feel about them, or how you could possibly like new characters as much as the old ones.

When I announced that I was writing Infernal Devices, while many of my readers were excited, just as many were entirely full of trepidation. They did not think they would like Will or Jem as much as Jace or Simon, or Tessa as much as Clary; they didn’t think they could possibly be as invested in the romance. There was a lot of “please, no, not these new characters, I am sure I will hate them, and Will especially" (being a Herondale, but not Jace.)

It took the first book, and maybe even a book and a bit, for me to start getting lots of letters from people who were just as invested in the new story and even liked Will and/or Jem better. So I guess what I would say is: there’s nothing I could tell you that would make you feel like you’ll love Jules (or James or Matthew or Jaime or any new, boy characters). There’s a reason “Show, don’t tell” is a (somewhat overused) watchword in writing: people don’t react to being told a character is awesome. They have to be shown it, in the pages of a book. I know this because I am a reader as much as I am a writer and I react exactly the same way. :)

The only way to find out how hot, or lovable, or whatever, you find Julian and/or Mark and/or Diego and Jaime, is to read Lady Midnight. I mean, I think they’re all hot and adorable in different ways. But my word will never carry the weight of a story, nor should it. I love Jules and he’s very different than any boy character I’ve written before. Whether you will love him as I do remains to be seen!

TDA snippet

She had wondered, when he’d looked into her eyes and said that he’d had to learn to make do without mirrors in the Wild Hunt, whose eyes he’d been looking into for all those years. Who’d been his mirror.

Now she knew.

Jessa stuff

Gotta keep the balance!

Hi Cassie! I loved all of your books, especially The Infernal Devices - I fell in love with Will *-*. I have a question about Jessa after CoHF: will they have children? I hope you’ll answer me :) Thank you for the amazing world you have created! — mrsherondale-eaton-waters 

Hello Cassie! I absolutely adore your books like many other people, but my boyfriend (who showed me your books) and I had one question, after Jem is no longer a silent brother, does he remain immortal like Tessa? Or will she end up losing him like she lost Will? Thank you for your time if you answer this, we’re both really curious. — sammy-mantha

Hello Cassie! I love your books!!!So… I finished to read Cohf and we know that Tessa is immortal and can have children, but I have a doubt. After so long, she can still have children? Or all these years, even with immortality, impair in any way? Thanks! — lightwoodparabatai

I love your books, and my favorite character is Jem, I just love it, then tell me we will see him next in the books of the shadowhunters? I loved him and Tessa on COHF. One more question, Jem and Tessa will have children ?? I’m so curious !!!! Please answer me !!! — anacarstairs

herondalectable said: Quick question: I know you’ve confirmed that the TMI characters will appear in future books, but what about Jem and Tessa? We know their story as far as the comic strip scene in CoHF, but what about beyond that? I’m not expecting anywhere near as much as we get of Will and Tessa’s married life (which I understand is not the main focus of TLH, but will be included as it was in TBC), but will we at least get a mention of how there doing and maybe of some Jessa babies?

gloriousburritos said: Hi Cassie! I just finished CoHF and I know this might sound weird but will Jem and Tessa ever appear in TDA since they were leaving for Los Angeles? Also, will they ever have children? I’m DYING to know because Jem is like my all-time fave character

Hey Cassie! I just had a little question about Tessa Gray. She’s immortal, but she was able to have children with Will. Is there any chance she can have one with Jem? Also, how does she put up with 130 years of periods? — 50shadesoftessagray

About Jem being mortal: Page 562 of Clockwork Princess:

Jem was mortal now. He would grow old like Will, and like Will he would die, and she did not know if she could bear it again. 

Page 711 of City of Heavenly Fire:

“So he is—Zachariah is mortal now?” Clary asked. “Just— an ordinary Shadowhunter?”
“Yes,” Tessa said. “He and I have known each other a long time. We had a standing meeting every year in early January. This year, when he arrived for it, to my shock, he was mortal.”
“And you didn’t know before he just showed up? I would have killed him.”
Tessa grinned. “Well, that would have somewhat defeated the point. And I think he wasn’t sure how I would receive him, mortal as he is, when I am not mortal.”

Jem is mortal. He has a human lifespan to live. That is a terrible thing for Tessa, but as I think you can probably tell by now, I’m not really a fan of “fixing” mortal-immortal relationships by making those who are mortal, immortal, or taking immortal characters’ immortality away. Immortality is a curse and a gift, and you undermine both aspects by taking it away easily; mortality is a curse and a gift and you undermine both aspects by taking it away easily. 

Jem and Tessa will have a lifetime together; Jem will cross over and see Will “on the other side of the river”; Tessa will be left to mourn him. I’ve always thought of all the characters in Clockwork Princess, in many ways Tessa’s is the saddest fate. Though:

About Tessa having kids: She can absolutely have kids! She doesn’t age out of that, because she doesn’t age. Cindy Pon has even been so kind as to help me with Chinese baby names so Jem’s family name, Ke, can be represented. I imagine Tessa and Jem would want to do some traveling and letting Jem adjust to life in the modern world (I think he would enjoy having an iPod filled with violin music) — and as I said, they have their own agenda in LA — before they have children, but they can certainly have them.

About 130 years of periods: I would guess this falls under the “not so great” aspect of being immortal. However, there are pretty easy ways to not have your period if you don’t want to (birth control pills) and I’d imagine Tessa has access to magical solutions as well. Boy, I never thought I’d be answering that question!

I know you’ve confirmed that the TMI characters will appear in future books, but what about Jem and Tessa? 

At the moment, they literally appear in the first chapter of Lady Midnight.

Wessa stuff

Hi Cassie, I have a question about CP2. Will obviously knows that Tessa loves him at the end of CP2, but that night in the drawing room (when Tessa burned her hand on the fireplace poker) when she didn’t tell him she loved him, he believed she didn’t and was obviously hurt. Unless I’m mistaken, which I could be, she never explained that to him later when they started dating/got married. Did he know? I mean, he’s very smart, so I feel like he could’ve figured it out, but did he? I can’t bear the thought of poor Will not knowing :( also, will Isabelle find a parabatai? D: thanks! — isabelleligtwood

Isabelle is not going to have a parabatai. Most people don’t, and Izzy is fine and happy without one. They are a lot of work and trouble. :)

I was confused at first reading the question and I thought that the question was whether Will ever realized Tessa loved him (which, after fifty years and two kids and a fabulous marriage, if he still didn’t, Will should get so much therapy) but I think now it’s whether Will realized Tessa loved him specifically that night in the drawing room.

As you said, Will is smart, and I think he figured out why she did what she did. He knows she loved him and she also loved Jem, and he knows she let him think she didn’t love him because she was trying to set him free. He would have done the same thing.

Even if he couldn’t intuit it (and he could), she does say this:

"I know how you are with your words, and, Will—I love all of them. Every word you say. The silly ones, the mad ones, the beautiful ones, and the ones that are only for me. I love them, and I love you.”

Will began to speak, but Tessa covered his mouth with her hand.

“I love your words, my Will, but hold them for a moment,” she said, and smiled into his eyes. “Think of all the words I have held inside all this time, while I did not know your intentions. When you came to me in the drawing room and told me that you loved me, it was the hardest thing I have ever done to send you away. You said you loved the words of my heart, the shape of my soul. I remember. I remember every word you said from that day to this. I will never forget them. There are so many words I wish to say to you, and so many I wish to hear you say to me. I hope we have all our lives to say them to each other.” 

That’s pretty explicit. You have to be careful, when characters are explaining things to each other (especially things readers already know) that they don’t sound like they think the other character is a dunce who needs everything spelled out for them. Tessa has to trust Will’s understanding of her, because if he isn’t someone who could understand this, she shouldn’t love or marry him.

Hi Cassie. <3 I have this important question. Well, important to me, hih. Will you be writing more about just Will and Tessa? As in, scenes from Will or Tessa’s point of view? :) (Psst, LOVE LOVE LOVE the new art of them. <3 Thank you for sharing.) — carinaolsen

Cassandra Jean is a fantastic artist, for sure. I think that it’s important to remember that TLH is about Cordelia, Jesse, Lucie, James, Matthew and the rest — though Tessa and Will are in it, and they are certainly the most important parents. They do have, also, I think some touching scenes just about them … and they also loom large in James’ mind, and indeed the minds of many in their circle as a Great Love Story (there’s more about that and James worrying his own life can never compete in Midnight Heir.) 

Maybe the best way to think about their role is to think about them as Charlotte and Henry in TID. They’re not the protagonists, but they’re background important figures who have their own relationship, do on occasion get POV scenes, and serve as a force of order in an otherwise chaotic world. :)

(There are definitely events in TLH that have specifically to do with Will and Tessa’s relationship, and Jem’s place in it, too. Just like there are also moments in TDA about Jem and Tessa. It’s interestingly difficult keeping the balance, but one could say that about the whole Clockwork series.)

Hi Cassie, I loved City of Heavenly Fire and cannot wait until the Dark Artifices comes out. I’ve seen the timeline you posted forever ago for the Mortal Instruments, but I was wondering if you could make a more detailed timeline that includes City of Heavenly Fire. Thank you so much!

Sure. Once more, with more details:

Here’s the basic timeline of the TMI books:

CoB: takes place in August 2007, the year the book was published.

CoA: begins in very early September 2007-  a few days to a week after CoB ends. 

CoG: begins in September, about 1 week after CoA ends. The whole book takes place in 1.5-2 weeks. It is mentioned that the leaves on trees are beginning to turn fall colors.

CoFA: begins in Mid-October (Halloween decorations are up, Simon mentions the month) and ends around the third or fourth week of October. In CoFA, it is also mentioned that Clary has been training to fight demons for 7 weeks.

CoLS: The prologue is set in late October. The first chapter begins two weeks later, in the 2nd week of November.

October had 5 weeks in 2007. Here’s a link to a 2007 calendar:


COHF: Takes place in early December through the end of December. It is mentioned in the beginning that people are shopping for Christmas presents. The last chapter ends before Christmas Day. Here’s where it get wibbly-wobbly-timey-wimey:

The Clockwork Princess prologue then  takes place in January, 2008, between the last chapter of CoHF and the epilogue of CoHF. Jem goes to meet Tessa.

COHF epilogue: May, 2008. It’s mentioned that it’s May, school’s almost out, etc. We see Jem and Tessa at the wedding, after their January meeting.

Tales from the Shadowhunter Academy takes up space in between May 2008— August 2013.

Lady Midnight begins in August, 2013. (Oddly, the same month the TMi movie came out. Randomly chosen, though.)


 I’ve gotten a lot of asks about where the epilogue of Clockwork Princess fits into the timeline of TMI. Here’s the basic timeline of the TMI books:

Read More

A small bird reminded me that the Stephen Herondale and Amatis Graymark flower cards hadn’t been posted. Here they are!

Hi Cassie. I hope you end up selling the tarot cards on like because I think they are amazing and so unique to the series. I hope you sell them on a site like the book depository so I know it will ship to Australia :) p.s. I am so freaking excited for TDA!!!! — monsters-drink-tea

Cassandra Jean and I are in the middle of finalizing putting up the tarot cards for sale now. It would be a limited run through a distributor that (as far as I know) ships worldwide.