Cassandra Clare is the pen name of Judith Rumelt, a former entertainment journalist who became one of the bestselling YA authors alive by building a single universe and refusing to leave it. She got her start in fan fiction, where her Harry Potter epics were famous enough to have their own drama, and that apprenticeship shows in the best way: she has always understood exactly what makes readers feral about a pairing. City of Bones arrived in 2007, introduced Clary Fray to the demon-hunting world of the Shadowhunters, and launched a franchise that now spans well over a dozen novels plus novellas, codexes, and graphic novels.
The Shadowhunter Chronicles is really several series stacked in a trench coat. The Mortal Instruments is the six-book original run with Clary and the infuriating, golden Jace. The Infernal Devices, set in Victorian London, is the one readers whisper about as her best: Tessa Gray caught between Will Herondale and Jem Carstairs in the rare love triangle where every side is right. The Dark Artifices raised the stakes and the age rating a notch, and The Last Hours returned to the Edwardian era. The finale of the whole thing, The Wicked Powers trilogy, begins with The Last King of Faerie in 2026, picking up Kit Herondale, Ty Blackthorn, and Dru Blackthorn, a send-off fans have waited years for.
In 2023 she finally stepped outside the universe with Sword Catcher, an adult fantasy set in the city-state of Castellane, where Kel serves as body double for a prince while the physician Lin Caster gets tangled in forbidden magic. Its sequel, The Ragpicker King, followed in March 2025, and she has announced a separate duology, In Fire Foretold, beyond that. The adult books are slower and more political than the Shadowhunter novels, with the romance simmering at about a 2 on our spice scale, while the YA books hover around a 1, heavy on charged almost-moments.
Adaptation-wise she has been unlucky. The 2013 Mortal Instruments film with Lily Collins flopped hard enough to kill its sequel, and the Shadowhunters TV series ran three seasons on Freeform with a devoted fandom and a lot of visible budget seams. The books have outlived both.
Fair criticism: the formula is visible. Forbidden love, a secret parentage reveal, a tortured boy with a dead or terrible father, repeat. Character types recur across generations with new haircuts. But the formula works because Clare executes the emotional beats with total commitment, and her parabatai bonds, warrior pairs sworn to platonic devotion that keeps threatening not to stay platonic, prefigured half the bonded-pair tropes romantasy now runs on. For this shelf she is a bridge: the writer a generation read at fourteen before graduating to fae courts and higher spice.
She is also unusually collaborative for an author with a universe this valuable. The Bane Chronicles, co-written with Sarah Rees Brennan and Maureen Johnson, gave the fandom's favorite warlock Magnus Bane his own spotlight, and The Eldest Curses novels with Wesley Chu followed Magnus and Alec as a couple, a ship so beloved it survived two adaptations and a decade of fandom churn intact. Add the tie-in codexes, the short story collections, and the graphic novel adaptations, and the Shadowhunter universe operates less like a book series and more like a franchise with a fandom wiki that rivals small encyclopedias. Somehow the machine keeps producing, with Clare publishing at a pace that has not meaningfully slowed since 2007, which among authors of her sales tier makes her nearly unique.
Where to start: purists say City of Bones for publication order, but honestly, Clockwork Angel is the stronger book and works fine as an entry. If you want no Shadowhunters at all, Sword Catcher stands alone. However you enter, pace yourself. This universe was designed to swallow readers whole, and it is extremely good at its job.
