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Cassandra Clare has teamed up with friend and fellow New York Times bestselling author Holly Black to write a new middle-grade fantasy series called Magisterium.

The Iron Trial, the first book in the five-book series, was published by Scholastic Books on SEPTEMBER 9, .

Each book will represent each year of protagonist’s Callum Hunt’s life between ages twelve through seventeen.

Here is the synopsis for The Iron Trial:

From NEW YORK TIMES bestselling authors Holly Black and Cassandra Clare comes a riveting new series that defies what you think you know about the world of magic.

Most kids would do anything to pass the Iron Trial.

Not Callum Hunt.

He wants to fail.

All his life, Call has been warned by his father to stay away from magic. If he succeeds at the Iron Trial and is admitted into the Magisterium, he is sure it can only mean bad things for him.

So he tries his best to do his worst &#; and fails at failing.

Now the Magisterium awaits him.