School of Secrets: Lonnie's Warrior Sword is the fourth installment of the series School of Secrets. It was released on August 15, 2017.

Lonnie is the daughter of Mulan.

She's strong. She's fearless. And she's willing to fight for what she wants. Like the very special sword that once belonged to her mother.

When Lonnie brings her friends Jay and Jordan on an forbidden trip to Imperial City to get it, she must prove she's a true warrior.

Product information

  • Age Range: 9 - 12 years
  • Grade Level: 3 - 7
  • Series: School of Secrets (Book 4)
  • Hardcover: 192 pages
  • Publisher: Disney Press (August 15, 2017)
  • Language: English
  • ISBN-10: 1484778677
  • ISBN-13: 978-1484778678
  • Product Dimensions: 5.9 x 0.9 x 8.3 inches
  • Shipping Weight: 1.7 pounds


  • This takes place after Descendants 2 as Dizzy Tremaine and Uma's Pirate Crew are mentioned.
  • This only material in which one of the main four VKs are absent. In this case Carlos does not appear but is mentioned.
  • There's a character named Yi-Min who is the daughter of Yao from Mulan who appears in the book.