The Duplicate - Sleator, William

When David duplicates himself with the mysterious spee-dee-dupe machine, he expects the duplicate to be a kind of substitute. Instead, David struggles for his own identity and eventually for his life when events take a horrifying turn.

The Duplicate 1999, Puffin Books, New York

ISBN-13: 9780141304311

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The Duplicate 1999, Turtleback Books

ISBN-13: 9780833559029

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The Duplicate 1999, Perfection Learning

ISBN-13: 9780812493559

Hardcover

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The Duplicate 1999, Turtleback Books

ISBN-13: 9780606167758

Hardcover

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The Duplicate 1992, Teens, London

ISBN-13: 9780749708788

Mass-market paperback

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The Duplicate 1991, Heinemann Young Books, London

ISBN-13: 9780434964093

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The Duplicate 1990, Starfire

ISBN-13: 9780553286342

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The Duplicate 1988, Dutton Books, New York, NY

ISBN-13: 9780525443902

Hardcover

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The Duplicate 1988, Turtleback Books

ISBN-13: 9780606046589

Hardcover

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