A boxed set of four volumes featuring Geronimo Stilton as he searches for lost treasure, travels through the jungle, hunts for a gem, and looks for a sunken treasure in the ocean.

I, Geronimo Stilton, traveled on the wings of the Dragon of Fortune back to the Kingdom of Fantasy! I was called there by my friend Blossom, Queen of the Fairies, who needed my help. The enchanted Winged Ring had gone missing! This was terrible news. The ring allows its owner to travel between the Kingdom of Fantasy and the real world-which would be a dangerous power if it fell into evil hands. Could I find the ring before it was too late?

From the bestselling middle grade series, a chapter book about a mouse journalist searching for a missing computer, plus a bonus short mystery and jokes. Grandfather William was throwing me, Geronimo Stilton, a party—it had been ten years since I published my first book! He wanted me to write a new book especially for the occasion. Then my laptop was stolen right from under my snout. Cheese niblets, how terrible! Could my friends and I find my computer and print my book all in time for the party? BONUS! After the story, read an extra Mini Mystery adventure: The Lake Monster. When a mysterious monster is sighted in a lake on Mouse Island, Geronimo is called in to investigate! But can he figure out this creature’s secret? PLUS cheesy jokes galore! Praise for Geronimo Stilton’s books: “Lightning pace and full-color design will hook kids in a flash.” —Publishers Weekly

Geronimo's adventurous sister Thea narrates this tale packed with action, mystery, and friendship!In this fabumouse adventure, the Thea Sisters head to Alaska, where they're attending a conference held by an important ecological association. Their host and his family are native Alaskans who show the mouselings their favorite games and activities. But soon there's trouble--the Thea Sisters discover that someone is upsetting the ecosystem by blowing up the ice with explosives! Can the Thea Sisters figure out what's going on and stop the destruction before it's too late?

Join Thea Stilton and the Thea Sisters in this adventure packed with mystery and friendship! The Thea Sisters are in Hawaii to compete in an international hula festival. The mouselets are having a great time -- until they learn that the festival is located on the side of a volcano that is about to erupt! No one else seems know about the danger. The Thea Sisters don't have any time to lose!

Geronimo's seventh quest in the Kingdom of Fantasy! I, Geronimo Stilton, was so excited to find myself in the Kingdom of Fantasy for a seventh time. Blossom, Queen of the Fairies, needed me to find the seven enchanted charms before the Wizard of the Black Pearl could get to them!Seven guardians across the realm protected each charm. When combined, the charms would bring enormouse power -- which the evil wizard was after. Squeak! Could I survive the dangers of new kingdoms and mysterious creatures to find the charms and save the Kingdom of Fantasy? I was up for the challenge!

Geronimo's sixth magical expedition! I, Geronimo Stilton, was shocked to find myself back in the Kingdom of Fantasy for a sixth time. I was needed to fulfill the Ancient Gemstone Prophecy!The evil empress of the witches was after the Royal Sapphire. If she united it with her Royal Ruby, it would give her immense power. The entire Kingdom of Fantasy was in danger! It was up to me to find the two gemstones first, with the help of new friends -- and this time, I had to travel in disguise. Cheese niblets! What an incredible journey!