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The Demon Headmaster (1982)
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Amazon.com Product Description (ISBN 0192753746, Paperback)Dinah moves in with the Hunter family and starts going to the same school as her foster-brothers Lloyd and Harvey. It's not easy, as they seem to hate her, and school is really strange. Pupils suddenly talk like robots and do weird things - even Dinah finds herself acting oddly. She's sure the headmaster has some kind of power over them, and is determined to find out more. But the Demon Headmaster is equally determined to stop her. Gillian Cross has won the Carnegie Medal, the Whitbread Children's Novel Award, and the Smarties Prize, and is a highly-acclaimed author. Sales of her books exceed one million copies.
(retrieved from Amazon Mon, 30 Sep 2013 13:38:14 -0400)
A demented headmaster, who controls his school by hypnotism, is foiled by an intelligent young girl when he attempts to extend his control further.
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