A lion cub is kidnapped while the Thea Sisters visit a Kenyan safari, and they must travel across the savanna to rescue him.

In order to save the reputation of the Wonderland, P.T. and Gloria must find the culprit who stole a royal tiara from the hotel.

Griffin Bing is in big trouble when a Super Bowl ring disappears from his middle school's display case, replaced by Griffin's retainer, and the more he and his friends investigate, the worse his situation becomes.

When a celebrated goldsmith from Hawaii creates a necklace for a famous actress, rumors that the necklace is about to be stolen prompt Geronimo Stilton's investigation to identify the thief.

"Zenith and her friends may be dead--but lucky for them, even getting ghosted wasn't enough to tear them apart. The four of them were thick as thieves long before an unfortunate lab accident sent them careening into the afterlife. So when they hear about a machine that could return them to the land of the living, they are determined to steal it. Unfortunately, the magical device belongs to a dangerous necromancer who's out for their ectoplasm. Fortunately,...

While celebrating his birthday with his family, Geronimo realizes someone has replaced all of his money with counterfeit bills and sets out to find the thieves.

Geronimo visits Cacklefur Castle for a vacation, but a ghostly thief on the grounds is targeting the von Cacklefurs' special pumpkins. --

Twelve-year-old Jake McQuade is the smartest kid in the universe, but if he wants to keep his title he will have to figure out a way to defeat the villain who steals his ingestible knowledge capsules.

Eleven-year-old Amelia thinks of herself as devoid of talent, but when the dragonfly staff goes missing seven days before the Dragonfly Day Festical, she takes it upon herself to catch the thief and save her town.

There is a legend that if the ravens at the Tower of London ever leave then Britain will fall, so when somebody steals the birds, the Queen calls for Mac B. to find the thief and retrieve them--a mission that takes him to Iceland, where he encounters secret submarines, hungry polar bears, and his arch-nemesis from the KGB.