"Little Mouse's Big Book of Fears" is a children's picture book written and illustrated by Emily Gravett. The story follows a small mouse who explores various fears, such as the fear of the dark, loud noises, and even larger animals. Each page features charming illustrations and relatable scenarios that help young readers understand and confront their own fears. The book is designed to be both engaging and educational, encouraging children to talk about their feelings. Through the mouse's adventures, readers learn that fears can be faced and managed, making it a comforting read for those who may feel anxious or scared.