Book Four: City of Fallen Angels (ISBN 9781406330335) by Cassandra Clare was first published on April 5, 2011. It was published by Walker Books Ltd. The book has been released on hardback, paperback and e-book.
Love, blood, betrayal and revenge – the stakes are higher than ever in the fourth book in the bestselling “Mortal Instruments” sequence. The Mortal War is over and sixteen-year-old Clary Fray is back home in New York excited about all the possibilities before her. She’s training to become a Shadowhunter and – most importantly of all – she can finally call Jace her boyfriend. But nothing comes without a price. Someone is murdering the Shadowhunters who used to be in Valentine’s Circle, provoking tensions between Downworlders and Shadowhunters that could lead to a second, bloody war. And when Jace begins to pull away from her without explaining why, Clary is forced to delve into the heart of a mystery whose solution reveals her worst nightmare: she herself has set in motion a terrible chain of events that could lead to her losing everything she loves. Even Jace.