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.
She's quirky, she's funny, and she loves solving a tricky mystery.
Will she be able to figure it out in time, or will the clock run out on her?
- 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.