The Magisterium series is a five-book middle-grade series of fantasy novels co-written by Cassandra Clare and Holly Black.

The first book, The Iron Trial, will be published by Scholastic Books in September 9, 2014.[1]

Each book will be a telling of Callum Hunt's life from age twelve to seventeen as he comes of age in a world where child apprentices train to be warriors and dark magicians seek to defeat even death.[2]


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