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Mouseheart Vol 1 Cover.jpg
Cover of Volume 1

  • Volumes:
  • Mouseheart: Book One
  • Hopper's Destiny: Book Two
  • Return of the Forgotten: Book Three

Author Lisa Fiedler
Illustrator Vivienne To
Country United States
Language English
Genre Adventure
Children novel
Publisher Margaret K. McElderry Books
Published 2014 – current
Media type Print (hardcover and paperback)

The Mouseheart series is an ongoing series of children's adventure novels by Lisa Fiedler. The series currently comprises three books, the first of which was released in 2014 by Margaret K. McElderry Books.

Plot overview

The series follows Hopper, a pet store mouse that escapes, only to end up in Atlantia, a colony created entirely of rats that lies underneath the city of Brooklyn. He quickly makes friends, however he also finds that the colony is constantly plagued by rebels and various other troubles.

Main characters

  • Hopper

He is the main character, and very loyal and brave.

  • Pinkie

She is Hopper's sister and is stubborn and fierce. The second book mentions that she is 'cold hearted' but later on is described as having a 'broken heart'.

  • Pup

The younger brother of Hopper and Pinkie. He is a caring fellow, who turns cold, but later on turns remorseful.

  • Zucker

The rat prince of Atlantia and son of Titus. He played a major role in the destruction of Atlantia's refugee camps.

  • Firren

Leader of the rebel rats and an ally of the Mūs. She later on becomes the wife of Zucker and Queen of Atlantia.

  • Emperor Titus

The evil rat king of Atlantia and father of Zucker. He struck an accord with cat queen, Felina, with a dark secret behind it.

  • Felina

The evil cat queen of the tunnels, she holds a nasty reputation with the citizens of Atlantia and the Mūs.


  • Mouseheart (2014)
  • Hopper's Destiny (2015)
  • Return of the Forgotten (2015)
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