When Geronimo buys his aunt's farm he discovers that the large oak tree in the yard holds legendary secrets to unlock.

While Geronimo's out with his family celebrating his birthday, he realizes someone's replaced all of his money with counterfeit bills. He and Hercule set out to find the thief

"The most famouse goldsmith in Hawaii created a necklace for a famous actress, but someone wants to steal it! Can Geronimo figure out who the thief is before they run away with the jewels?"--

"Creepella is about to interview the famouse Hector Spector, who has come to Mysterious Valley with his Galloping Ghost Circus. But before she can, she has a mystery on her paws--someone is playing tricks and making messes all over Cacklefur Castle! Can she put a stop to these ghastly gags?"--P. [4] of cover.

Geronimo is taking his Benjamin on a trip to Rome to learn the city's history (and keep him from failing fifth grade), but when they arrive they're immediately pulled into the investigation of the "ghost" of a gladiator that seems to be haunting the Colosseum and scaring tourists away.

Creepella's father, Boris von Cacklefur, is a finalist in the Fright Night poetry competition, but when Boris suddenly vanishes during the contest, it is up to Creepella and her friends to investigate.

"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.

It was spring in New Mouse City! I love to celebrate the season with my fellow mice by exchanging chocolate eggs and competing in a confectionary challenge. This year, there was also a special exhibition of priceless jeweled Mouseberge eggs in town. Then the Mouseberge Egg was stolen--and it was up to me to find it! Squeak!