With two of the Mortal Instruments now in Valentine's hands, the world of the Shadowhunters teeters on the brink of civil war. And the search has begun for the last of the Instruments, the Mortal Glass. Clary finds herself caught up in the chaos as the delicate social order of the Nephilim begins to shatter. When the City of Glass falls under attack, can Downworlders and Nephilim fight together to defeat Valentine, or will their longstanding hatred destroy them all? And when Clary discovers the unbelievable truth about her own past, can she find Jace before it's too late?

Cassandra Clare is the author of the internationally bestselling Mortal Instruments, The Infernal Devices, The Bane Chronicles, The Dark Artifices, The Shadowhunter's Codex and Tales from the Shadowhunter Academy. Her books have more than 50 million copies in print worldwide and have been translated into over thirty-five languages. The Mortal Instruments: City of Bones is a major movie and Shadowhunters is airing on Netflix. Cassandra lives in Massachusetts, USA. Visit her online at CassandraClare.com. Learn more about the world of the Shadowhunters at UKShadowhunters.com.