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Twelve-year-old twins Nick and Eryn investigate why their mother and new stepfather are keeping secrets, why they are forbidden to meet their stepsiblings, and, most important, why their lives are in danger.

Under Their Skin 2017, Simon & Schuster Books for Young Readers

ISBN-13: 9781481417594

Reprint edition

Trade paperback

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Under Their Skin 2017, Turtleback Books

ISBN-13: 9780606397568

Library edition

Hardcover

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Under Their Skin 2016, Simon & Schuster Books for Young Readers

ISBN-13: 9781481417587

Hardcover

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