Geronimo Stilton, which was originally written in Italian, is a tale about a talking mouse that lives in New Mouse City on Mouse Island, where he works as a journalist for The Rodent's Gazette. Included here are adventure books fifteen and sixteen: A Cheese-Colored Camper and The Mona Mousa Code.

Presents three stories about the adventures of the mouse journalist in which he goes on a rescue mission to a land of vampire bats, is attacked by a ship of pirate cats, and takes a vacation only to find himself rooming with Gerbil Scouts.

"The phantom of the subway: When my sister Thea told me a ghost was haunting New Mouse City's subway tunnels, I had to get the scoop! So I set off with Thea, Trap, and my assistant editor Pinky Pick. But we were all in for the fright of our wee mouse lives...because the ghost turned out to be a CAT! The temple of the ruby of fire: It was my most thrilling adventure yet! My old friend Professor von Volt had discovered the location of the famous Ruby...