Hoping to bring back her father and the other missing royals of Cello, Princess Ko gathers a group of teens, each with a special ability, including Elliot, whose forbidden communications with Madeleine may be the key to traveling across worlds.

The Cracks in the Kingdom 2015, Scholastic on Brilliance Audio

ISBN-13: 9781501249983

Audiobook CD

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The Cracks in the Kingdom 2014, Arthur A. Levine Books

ISBN-13: 9780545397384

Hardcover

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