Geronimo joins the effort to rescue Blossom, Queen of the Fairies, who has been kidnapped by the Queen of the Witches and taken to the Kingdom of Nightmares.

"Geronimo and Trap decide to start making organic honey with the help of some beekeepers. When the honey is ready, they face up against the evil Madam No."

After receiving a mysterious message summoning him to a meeting, Geronimo Stilton finds himself back in the Kingdom of Fantasy, summoned by the Elves, who want him to travel to the Great Explanatorium to find an answer to the earthquakes that are threatening the Kingdom.

When, in the process of testing his newest time machine, Professor von Volt accidently brings a triceratops, Helen of Troy, Attila the Hun, Charlemagne, and Christopher Columbus to present day New Mouse City, it is up to Geronimo and his friends to return them all to their own times and places--without being eaten by a T-Rex or skewered by Trojan warriors.

On his way to the Grand Masked Ball and what promises to be a disaster of a date, Geronimo's once again whisked away to the Kingdom of Fantasy where he must save the Princess of the Vanilla Fairies from an evil wizard who's using the pirate ship, Ship of Secrets, to gather magical objects to increase his power and take over the kingdom.

The enchanted Winged Ring which Queen Blossom gave to Geronimo is missing, apparently stolen by the dark fairy Wither and her dark crow allies, and whoever possesses it gains enormous power and can travel between the Kingdom of Fantasy and the real world. Now nightmares are starting to affect Mouse Island, the entire Kingdom is furious with Geronimo, and it's up to one mouse to set things straight and recover the ring.

Geronimo Stilton is summoned back to the Kingdom of Fantasy, but he finds Blossom, Queen of the Fairies, surrounded by dark fairies and behaving very coldly--and it is up to Geronimo to figure out just what is going on and find the allies he needs to free Blossom from the evil spell that is affecting her.

Geronimo is in the Kingdom of Fantasy for training on the "Balanced Path" when he learns that Queen Blossom has had a beautiful baby girl, Winglet, and that the baby princess has been kidnapped--and it is up to the brave mouse as Guardian of the Realm to discover who has taken Winglet, and return her to her distraught parents.

Once again Geronimo is summoned to the Kingdom of Fantasy, and this time he must rescue five princesses of The Kingdom of Lotus Flowers who have been kidnapped by a terrible witch--but first he must journey to the Island of Dragons to find the bravest, the wisest, the silliest, and wittiest, and the most sincere dragons who prophecy says will aid him in his mission.

Drawn once again into the Kingdom of Fantasy, Geronimo discovers that the Land of Books is being threatened by a wave of grayness spreading from the Kingdom of Swamp Valley rotting books and turning all the characters gray, sad and worried--and it will be up to Geronimo, Winglet (daughter of Blossom and newly crowned empress), and the intrepid characters from fiction who join them along the way, to locate the source of this new evil and put a stop...