When you're with Geronimo Stilton, it's always a fabumouse adventure! Great Gouda! There were hearts everywhere in New Mouse City. My friend, Creepella, had started a new dating and wedding-planning agency, and she chose me as her assistant! But someone was trying to sabotage the matches. Could I figure out who before hearts are broken?

"There's a haunted shipwreck off Whale Island, and a rare diamond was lost when the ship sank. When the Thea Sisters' biology professor disappears, the mice have to dive deep into the ocean to find him -- and hopefully recover the priceless jewel! And just when they think their adventures are over, the five mice are invented to China to search for another lost treasure!"

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...

A visit to a mysterious clock store leads Geronimo Stilton back to the Kingdom of Fantasy which is facing a crisis: something is making the magical timepiece that measures out the life of Blossom, Queen of the Fairies, run fast so she is aging at an alarming rate--and if she dies, so does the Kingdom.