Matt's magic crystal enables him to read people's minds and he is determined to keep it a secret. But he does tell his best friend Cally. Soon someone is trying to blackmail him. But when he sets a trap for the blackmailer, he is horrified to discover that it is Cally.
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Book Description Puffin Books, 1999. Paperback. Book Condition: New. Ron Tiner (illustrator). book. Bookseller Inventory # M0141302917