Geronimo and his sister, Thea, hear that there is a secret hidden in the famous painting, the Mona Mouse. But first they must break the code. They begin to investigate a trail of clues below the streets of New Mouse City.
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Details
ISBN: 9780439661645 (pbk.)
ISBN: 0439661641 (pbk.)
Physical Description:112 p. : col. ill., col. maps. --print
Publisher:New York ; Toronto : Scholastic, c2005.
General Note: LSC 9.99Translation of: Il sorriso di Monna Topisa.Geronimo Stilton is a fictitious character.