Little Mouse and the Amazing Universe - Elina Ahlback Literary Agency – One of the leading Nordic literary agencies

Original title: Hiiru, mahtava maailmankaikkeus

Author: Riikka Jäntti

Published: 2025

Publisher: Tammi

Genre: Chapter Books (3-6 Years)

Part of a series: Little Mouse series

Reading material:

English PDF

The new chapter books follow the same lovable Little Mouse from the picture books, now all grown up and navigating life as a schoolkid.

✓ The Little Mouse series has sold to 21 territories!

✓ Sold to Poland pre-publication alongside with LITTLE MOUSE’S HILARIOUS HALLOWEEN (publ. fall 2025)

✓ Second chapter book after LITTLE MOUSE’S SCHOOL PICTURE DAY

✓ Introducing the beloved picture book character to young readers 5+!

Outer space is so big and amazing!

Another adventure of a relatable little mouse as he goes to school. The kids receive an interesting school assignment from space. Which planet is the largest or smallest? Which one is the best of all?

Hiiru, Lyly and Antero are working together on a presentation about Mars. Grandpa also wants to help, but his book contains outdated information. What might Mars be like, and how many light-years away is the nearest star? Thinking about this makes Hiiru feel very small, even though the universe is such a fascinating place!

"The expressive mice and other characters drawn by Riikka Jäntti are truly unique."

– Kirjavinkit.fi, blog, Finland

Download reading materials

Rights sold:
FINLAND: Tammi
POLAND: Filia

Riikka Jäntti

Riikka Jäntti, a 2003 graduate of University of Industrial Art of Helsinki, now part of Aalto University, is a Helsinki-based illustrator and author who has created art for both nonfiction and fairy tale books for children. Her first children’s book was published in 2005. Jäntti is best known for the adorable Little Mouse series that has publishers in 20 territories, including Australia, Nepal, and China!

In her illustrations, she uses pen and ink as well as watercolor and gouache. In 2009 Jäntti won the first-ever Tieto-Lauri, an award for children’s and juvenile non-fiction, for her illustrations in Viidakkotanssi (Jungle Dance). The book was written by Markku Löytönen about the explorer Rafael Karsten in Ecuador.

About author

Bibliography