Geronimo has been dreaming of a nice relaxing vacation at a seaside resort, but he winds up in a horrible fleabag hotel with barely any hope of enjoying his vacation.

"Something is wrong with Gorgo, the monster in the moat of Cacklefur Castle! Creepella discovers that he is lovesick for the monster Blobbina, who also happens to be a famous movie star. But when Creepella delivers Blobbina a love letter from Gorgo, she finds out Blobbina has disappeared! Creepella and Billy Squeakspeare head to Horrorwood to search for the missing Blobbina. Will they ever find her?"

Geronimo Stiltonoot wakes up to a terrible morning. Meteors are falling from the sky, and everyone in Old Mouse City has an awful stomachache! Geronimo must travel to the Cave of Memories to find the ancient shaman cure for his fellow cavemice. But dangers lurk on the journey -- can he make it back home safely?

"A mysterious old friend of Grandpa Frankenstein shows up one night on the doorstep of Cacklefur Castle. He's a vampire - and he needs the von Cacklefur family's help. His ancient castle has been infested by strange and troublesome monsters and ghosts, and he's afraid he'll have to move out because of them! .... It's up to Creepella and her family and friends to help this vampire save his home"--P. [4] of cover.

Geronimo follows clues in a diary all the way to Mouse Everest in search of his old friend Professor von Volt who has mysteriously disappeared.

Geronimo travels to Egypt to interview Professor Alrat Spitfur and learns the secret of the Seven Wonders of the Ancient Mouse World.