Author: Geronimo Stilton
(can you find out who the "real" author is?)
Country of origin: Italy
The official Geronimo Stilton website -- where you can enter in a number of different languages, e.g., English, Italian, German, French, and Spanish
The Rodents's Gazette (on the Scholastic Books website)
A list of all the characters that appear in the books, thanks to the KidsRead website
Other books in this series (there are a lot of them!)
Other mouse detective books:
Time Stops for No Mouse -- by Michael Hoeye