When Cedric, crowned prince of Caelum, and his royal friends find themselves stranded in modern-day Los Angeles, via a magic portal and the evil traitor Malquin, all they want to do is get home to Caelum as soon as possible. As they explore possibilities, they meet Liv, a filmmaker foster girl who just wants to get out of the foster system and on with her life. As she and Cedric become friends, they discover that she's more connected to his world...

When pirate cats threaten Mouse Island, Professor von Volt sends Geronimo Stilton and his friends back through time to ancient Greece, Atlantis, and Stonehenge to try and find out how ancient civilizations were able to find peace and avoid war--only to find that the key to peace was under their whiskers the whole time.

"It's been months since our hero returned from Lemurea, but nothing is back to normal. When Archibald realizes he isn't the only thing that crash-landed at the manor that night, he knows he'll need to return to the dark world he only just left. Archibald is a changed boy. He stands up to bullies and hangs out with the gargoyles that used to scare him. But for all his new toughness, he's also a lost boy who misses his friends in Lemurea. When strange...