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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.


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


  • 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.


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Films: Descendants | Descendants 2 | Descendants 3
Web Series: School of SecretsDescendants: Wicked World
Video Games: Descendants: Isle of the Lost Rush
Music: Soundtrack
Books: Isle of the Lost: A Descendants NovelDisney Descendants YearbookDisney Descendants: Secrets of Auradon Prep: Insider's HandbookDescendants: Mal's Spell BookDescendants: Junior NovelDescendants: Mal's DiaryReturn to the Isle of the Lost: A Descendants NovelDescendants: Wicked World Wish Granted Cinestory Comic Volume 1Descendants: Wicked World Cinestory Comic, Vol. 2Descendants: Wicked World Cinestory Comic Volume 3Descendants: Wicked World Cinestory Comic Vol. 4Disney Descendants: Up Close!School of Secrets: CJ's Treasure ChaseSchool of Secrets: Freddie's Shadow CardsSchool of Secrets: Ally's Mad MysteryAuradon Prep Spirit Book: Highlights and MemoriesRise of the Isle of the Lost: A Descendants NovelMal's Spell Book 2: More Wicked MagicDescendants 2: Junior NovelDescendants 2: Evie's Fashion BookIsle of the Lost: The Graphic NovelEscape from the Isle of the Lost: A Descendants NovelReturn to the Isle of the Lost: The Graphic Novel