Callum Hunt’s summer break isn’t like other kids’. His closest companion is a Chaos-ridden wolf, Havoc. His father suspects him of being secretly evil. And, of course, most kids aren’t heading back to the magical world of the Magisterium in the fall.
 
It’s not easy for Call . . . and it gets even harder after he checks out his basement and discovers that his dad might be trying to destroy both him and Havoc.
 
Call escapes to the Magisterium -- but things only intensify there. The Alkahest -- a copper gauntlet capable of separating certain magicians from their magic -- has been stolen. And in their search to discover the culprit, Call and his friends Aaron and Tamara awaken the attention of some very dangerous foes -- and get closer to an even more dangerous truth.
 
As the mysteries of the Magisterium deepen and widen, bestselling authors Holly Black and Cassandra Clare take listeners on an extraordinary journey through one boy’s conflict -- and a whole world’s fate.

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. 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 latest series, The Infernal Devices, has spawned three #1 bestsellers. Born overseas, Cassandra spent her early years traveling around the world with her family and several trunks of books. She lives in Massachusetts.