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Moonleapers

Margaret Peterson Haddix

Ages 9–14 NYT Best Seller

Readers rate it 4.5 (2 on Hardcover)

Released Sep 16, 2025

Content report card

What's inside

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Language

Sexual content

LGBTQ+ themes

Substance use

What it offers

Educational value

A note for parents

Moonleapers is a time-travel mystery adventure with strong character development and humor that appeals to middle-grade readers who enjoy The Mysterious Benedict Society. The book addresses mature themes like terminal illness, dementia, grief, and genocide, which are serious but presented in a way that drives the plot rather than graphically depicted. While there is some violence and war mentioned, the focus remains on problem-solving and the emotional connections between characters rather than action sequences.

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From the publisher

From New York Times bestselling author Margaret Peterson Haddix comes a suspenseful duology opener about a girl whose first phone connects her to a network of time travelers who want to change the world. Perfect for fans of The Mysterious Benedict Society and City Spies! When Maisie's mom gives her an old phone, Maisie... From New York Times bestselling author Margaret Peterson Haddix comes a suspenseful duology opener about a girl whose first phone connects her to a network of time travelers who want to change the world. Perfect for fans of The Mysterious Benedict Society and City Spies! When Maisie's mom gives her an old phone, Maisie can't believe her luck--finally, she can keep up with everyone at school! Unfortunately, her mom also tells her that the whole family will be moving to spend the summer taking care of Maisie's great-aunt Hazel. Maisie's only getting a phone because she'll be responsible for her younger siblings during the entire trip. With that, Maisie is ready to give the phone back. Then the first puzzling text comes in. Between the mystery texts and a not-completely-blank book from Great-Aunt Hazel, Maisie finds herself thrown into the world of moonleapers. Will she be able to learn more about the secretive group, and--gulp--help them accomplish their crucial mission in time?

Shelved under

  • Juvenile Fiction
  • Plot driven
  • Strong Character Development
  • Loveable Characters
  • Not Diverse Characters
  • Adventurous
  • funny
  • mysterious
  • Science Fiction
  • Fantasy
  • Young Adult
  • Adventure

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ISBN 9780063392564 · Quill Tree Books