Geronimo Stilton is an Italian children's book series written by Elisabetta Dami (though the covers claim they were written by the title character). On older novels, the copyright is issued to a pseudonym "Geronimo Stilton"; this was changed on newer books. The books are intended for readers in the 8–12 year-old age range. The books are also intended for readers on the N level.

Scholastic Corporation has published the English version of the series in the US since February 2004, and the books are published by Sweet Cherry Publishing in the UK.

The series has sold over 180 million copies worldwide, and with 249 editions it is one of the best-selling book series ever written. The books have been translated into 49 languages, with more translations to come.

In the series, the title character is an anthropomorphic Dutch-American mouse who lives in the fictional New Mouse City (a probable play on New York City) on fiction…Read more on Wikipedia