<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (April 2012) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (April 2012) (Learn how and when to remove this template message) </Td> </Tr> <P> Geronimo Stilton is an Italian children's book series published by Edizioni Piemme of Milan, Italy, since 2000 . Scholastic Corporation has published the English version of the series since February 2004 . Although the series credits its title character as the author, the idea was originally thought of by Elisabetta Dami . 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 6--12 - year - old age range . </P> <P> The series has sold over 130 million copies worldwide, becoming one of the best - selling book series ever written . </P>

Who was the author of geronimo stilton books