Happy to be adopted at last, twelve-year-old orphan Mary Hayes soon learns a terrifying secret about her new mother, the mysterious Madame Z.

The Door by the Staircase 2017, Disney-Hyperion

ISBN-13: 9781423137856

Trade paperback

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The Door by the Staircase 2017, Turtleback Books

ISBN-13: 9780606395052

Bound for Schools & Libraries edition

Hardcover

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The Door by the Staircase 2016, Disney-Hyperion

ISBN-13: 9781423134992

Hardcover

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The Door by the Staircase 2016, Dreamscape Media

ISBN-13: 9781682628034

Audiobook CD

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