When Geronimo's sister, Thea, discovers an old, mysterious map showing a secret treasure hidden on a faraway island, the gang of the "Rodent's gazette" is dragged into a treasure hunt.

Geronimo Stilton tries to rescue his cousin from the vampire bats of Transratania.

Geronimo explores a haunted mansion populated by the ghosts of cats!

Geronimo and friends go to the Egyptian Museum just before Halloween to investigate what seems to be a real live mummy.

"Yes, it's true--I'm a total 'fraidy mouse and the biggest worryrat. In fact I'm the complete opposite of my super-sporty and very brave friend Bruce Hyena. That's why I couldn't believe it when he dragged me off on a series of outrageous adventures to toughen me up. I had to keep reminding him that I'm not a supermouse! Or am I?"--P. [4] of cover.

Phantom of the subway: When he hears reports of a ghost haunting New Mouse City's subway tunnels, Geronimo sets out to investigate. Temple of the Ruby of Fire: Geronimo, Thea, Trap, Benjamin and Geronimo race against time to find the legendary Ruby of Fire before it falls into the wrong paws.