School of Secrets: Ally's Mad Mystery

School of Secrets: Ally's Mad Mystery is the third book in the Descendants book series, School of Secrets. It was released on February 28, 2017.

Synopsis
Ally is the daughter of Alice in Wonderland.

She's quirky, she's funny, and she loves solving a tricky mystery.

When strange things start happening at Auradon Prep that threatens the school's big spirit weekend, Ally is determined to find who's behind the madness.

Will she be able to figure it out in time, or will the clock run out on her?

Product Information

 * Age Range: 9 - 12 years
 * Grade Level: 3 - 7
 * Series: School of Secrets (Book 3)
 * Hardcover: 192 pages
 * Publisher: Disney Press (February 28, 2017)
 * Language: English
 * ISBN-10: 1484778669
 * ISBN-13: 978-1484778661
 * Product Dimensions: 5.5 x 0.8 x 8 inches

Trivia

 * This book is stated to take place a "few months" after the last one.
 * It is revealed in the book that there is a town called Tweedleton where the characters from Wonderland have all retired to.
 * There are two new Auradon kid characters in the book, known as the Tweedledee and Tweedledum cousins, who are the sons of the Tweedledee and Tweedledum brothers.