The stakes have never been higher than in the final installment of Magisterium from the bestselling powerhouses of Holly Black and Cassandra Clare.

Callum Hunt has been a hero and an outcast, a force of good and a portent of evil. While the doors of the Magisterium have been open to him, he has never felt entirely welcome. If anything, he has felt others' resentment . . . and fear.Now, as he begins his final year at the magical school, his place is less certain than ever. With one unique exception, he is estranged from most of his friends. A furtive darkness still hounds him. And the greatest challenge he will ever face is right around the corner. In this monumental conclusion to the Magisterium series, bestselling authors Holly Black and Cassandra Clare push Callum to the brink of annihilation, showing how magic has the ability to both save and doom, create and destroy.

Holly Black is the #1 New York Times bestselling author of The Spiderwick Chronicles (with Tony DiTerlizzi) and the Newbery Honor-winning novel Doll Bones. Her other books include The Good Neighbors graphic novels, and the novels The Darkest Part of the Forest, Tithe, Valiant, and Ironside. With Cassandra Clare she is the author of the Magisterium series, a New York Times bestseller. She currently lives in the realm of Western Massachusetts.



Cassandra Clare is the author of City of Bones, the first book in The Mortal Instruments trilogy and a New York Times bestseller. Her The Infernal Devices series has spawned three #1 bestsellers. With Holly Black she is the author of the Magisterium series, a New York Times bestseller. Born overseas, Cassandra spent her early years traveling around the world with her family and several trunks of books. She lives in Massachusetts.