Spacemouse Geronimo Stiltonix's adventures are out of this world! While at the beach, Geronimo Stiltonix stumbles upon a mysterious treasure map! The spacemice follow it and end up on Aquarix, a planet that's entirely underwater. During their exploration, they face fur-eating seaweed, ferocious piranha aliens, and . . . pirate spacecats! Squeak! Can the spacemice keep the spacecats from stealing the treasure?

Professor Greenfur, the onboard scientist on spaceship MouseStar 1, has changed color from green to... orange! What's going on? To find out, the spacemice travel to his home planet of Photosyntheson. There, they learn that all of Professor Greenfur's relatives are being threatened by the nibblix, tiny aliens with very sharp teeth! Can the spacemice help in time?

Spacemouse Geronimo Stiltonix's adventures are out of this world! Geronimo Stiltonix and the spacemice are visiting a planet where the most delicious wild mozzarella grows. Yum! But the planet is plagued by the slurp monster -- a scary alien who wants all the mozzarella for himself! Can the spacemice restore harmony on this cheesy planet without getting slurped up themselves?

Spacemouse Geronimo Stiltonix's adventures are out of this world! The on board computer on spaceship MouseStar 1, Hologramix, is out of order! To fix it, Geronimo Stiltonix must take it to a brilliant inventor who lives on a distant planet. But while Hologramix is being repaired, pirate spacecats attack, and steal it! Can the spacemice get Hologramix back before the spacecats turn it evil and set it against them?

When you're with Geronimo Stilton, it's always a fabumouse adventure! My detective friend Hercule Poirat and I were headed to India. A Bollywood star we're friends with had received a valuable ruby and wanted us to help her protect it... which meant that I ended up acting in the movie she was filming! Rancid ricotta -- I'm a terrible actor! Even worse, just when we least expected it, the ruby was stolen. Could we find the thief?

For cavemouse Geronimo Stiltonoot, life is one prehistoric problem after another! In the lagoon near Old Mouse City, cavemice have discovered a giant oyster. It holds a pearl of megalithic proportions! Since the mice of the lagoon don't have the tools to fish the oyster out of the water, they call on Geronimo Stiltonoot to help. Can figure out how to get the pearl before the saber-toothed tigers catch wind of it?

All the mammoths have fled Old Mouse City! It's a total cat-astrophe! Not only because mammoths are valuable allies of the cavemice, but also because without them, the cavemice can't make mammoth milkshakes, their delicious national drink. Geronimo Stiltonoot must embark on a daring journey to find the mammoths...and avoid going extinct before he gets back!

When you're with Geronimo Stilton, it's always a fabumouse adventure! I was traveling to London, England on a secret mission! I had to investigate some strange occurrences -- someone was trying to get their paws on the crown jewels! Trap came along, too, to compete in a big magic show. And before I could solve my mystery, Trap needed my help... to perform an impossible magic trick. Could I do it all? Squeak!

For cavemouse Geronimo Stiltonoot, life is one prehistoric problem after another! Geronimo's cousin Trap Stiltonoot is stung by a dangerous cavefly, which causes him to fall into an instant, deep sleep! To cure him, Geronimo and Thea must seek out the petals of the pink stinkrose, a rare and smelly flower. But it only grows on a very high peak! Can they make it there without going extinct on the way?

For cavemouse Geronimo Stiltonoot, life is one prehistoric problem after another! Geronimo Stiltonoot and friends have been invited to participate in a Stone Age treasure hunt! How fun! The one issue is that it has been set up by Gossip Radio host Sally Rockmousen, Geronimo's rival. Is it some sort of trick? The hunt is full of difficult riddles and very stinky dinosaurs... but nothing will stop Geronimo's team!