Geronimo unlocks the mystery in this fabumouse adventure -- which includes a bonus story! My sister, Thea, had discovered an enormouse old castle built by the founder of New Mouse City! She and Trap dragged me along with them to explore it. Inside, we found one hundred keys... but only ninety-nine doors to unlock. What mysterious room did the hundredth key open? It was up to us to find it and reveal its secrets! BONUS! After the story, read an extra Mini Mystery adventure and jokes galore!

My sister, Thea had discovered an enormouse old castle built by the founder of New Mouse City! She and Trap dragged me along with them to explore it. Inside, we found one hundred keys. With only ninety-nine doors to unlock. What mysterious room did the one hundredth key open?

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

When the rodent residents of New Mouse City begin succumbing to stomachaches, hiccups and weird green warts, Geronimo Stilton and his detective friend, Hercule Poirat, race against time to investigate before they also fall ill. Simultaneous eBook.

The Colosseum is being haunted by a gladiator ghost. None of the tourists want to visit anymore! Geronimo must solve the mystery and rid the site of its ghost.*Plus BONUS Mini Mystery: The Cheese BurglarCan Geronimo clear his name and catch the real thief before it's too late?

Geronimo is on the hunt in this fabumouse and super-sized adventure! There was a mystery in New Mouse City's Egyptian Mouseum! The Black Papyrus, an ancient document that reveals the secret of eternal youth, had disappeared. The mouseum's director asked me to help him find it. Yikes -- those Egyptian artifacts freak me out! Luckily, a secret agent came to our aid... but could we trust him? It was up to us to recover the precious scroll! BONUS! After the story, read an extra Mini Mystery adventure and jokes galore!

Praise for The Sewer Rat Stink:"Fresh, funny, and fast-paced. The free-style artwork and anything-goes story will make kids want to write and draw their own books!" -Dav PilkeyThis is Geronimo Stilton like you've never seen him before! A stinky smell is taking over New Mouse City! No mouse can live like this! Geronimo and his best friend Hercule, the private detective, head underground into the sewer world of Mouse Island to investigate. Can they save the city from the stench?This is all-new Geronimo Stilton as interpreted by author, artist, and longtime fan Tom Angleberger. Tom is a New York Times, USA Today, and Wall Street Journal bestselling author.