Additionally, a picture book titled Little Babymouse and the Christmas Cupcakes,[7] which was also the first entry in the series to feature full-color print, is aimed at younger readers.

Squish is a spinoff series featuring Babymouse's science fair project, an anthropomorphic amoeba.

[8] Babymouse has sold over three million copies,[3] receiving praise from critics and readers alike for its humour and visual style.

[11] While sitting in her kitchen, the image of a grumpy mouse with big whiskers and hands on her hips appeared in Jennifer's mind, leading her to scribble it onto a napkin.

[9][12][11] The reason they decided on a graphic novel format was because they believed comic books had shifted to an adult audience, and they wanted to create a comic book that would become popular with children that featured an easily relatable character.