Interest LevelReading LevelReading A-ZATOSWord Count
Grades 4 - 8Grades 3 - 6n/a5.761741
The Warriors series meets Redwall in this first book in an epic animal adventure series set in the subway tunnels of Brooklyn and for “fans of Erin Hunter, Brian Jaques, and Kathryn Lasky” (School Library Journal).

Hopper is just an ordinary pet shop mouse before he escapes. Soon he finds himself below the bustling streets of Brooklyn, deep within the untamed tangles of transit tunnels, and in Atlantia, a glorious utopian rat civilization.

But all is not what it seems. Though Hopper is treated as a royal guest, he misses his siblings that he lost in the escape attempt. That, and Atlantia is constantly threatened by the rebels who wish to bring the city to its knees. And there are cats everywhere in Atlantia, cats that leave the citizens unharmed… and no one can seem to answer why.

Soon, Hopper is caught in the crosshairs of a colossal battle, one that crosses generations and species. As the clashes rage, Hopper learns terrible, extraordinary secrets: Deadly secrets about Atlantia. Painful secrets about his friends.

And one powerful secret about his destiny…

Learn more at!
Paperback, 336 pages
Published on May 5, 2015 by Margaret K. McElderry Books
ISBN-10: 1442487836
ISBN-13: 9781442487833
4 Book Reviews
  • magicalmythical
    magicalmythicalMonday, August 31, 2020 at 6:30 pm55 stars
    I love this book!
    • bookstory14
      bookstory14Saturday, January 5, 2019 at 4:55 pm55 stars
      Mouseheart is the tale of a brave young mouse and an explored world. Hopper's mom disappeared and now all he has left is his sister, Pinkie, and his little brother, Pup. But when he is forced into the world of the rats and then stolen to the world of the mice, he has to decide....who is telling the truth? What is hidden in the refugee camps? And how is he the "Chosen One?" I loved Mouseheart. I thought "Listen up, you, you don't usually read books told by mice!" but I decided to give it a go because my aunts recommended it to me, and it was worth it! I would give this book six out of five, but since there's only five stars, I'll have to go with a full 100% awesomeness rating! -- BKS reviews
      • myepez2
        myepez2Friday, April 15, 2016 at 12:17 pm55 stars
        Hopper was scarred in his caged and becomes a hero
        • happypug12
          happypug12Friday, August 14, 2015 at 9:56 am44 stars
          An unoriginal story, yet descriptive writing. A bit too descriptive, in my opinion, as some words were indecipherable. But it was good. I won't say I absolutely adored it, but I can't say that I despised it either. Plus, I don't think using mice as characters was the best idea, but Lisa did her best. The inside illustrations were a welcome surprise.