When eleven-year-old Kate and her younger brother Michael encounter a baby griffin in an Italian garden, they vow to help the creature find its way back home and to keep Griffo's existence a secret.

Twelve-year-old Cassie Arroyo is a student in Rome, but her life changes when a secret organization, the Hastati, shoots her father--and she learns that she is a member of an ancient bloodline that enables her to use the Spear of Destiny, a legendary object that can alter the future.

Two brothers, having run away from the aunt who plans to adopt the younger one, are sought by a detective hired by their aunt, but they have found shelter with--and protection from--Venice's "Thief Lord." Welcome to the magical world of Venice, Italy, where hidden canals and crumbling rooftops shelter runaways and children with incredible secrets.

Two orphaned peasant children discover a mysterious pouch, the contents of which lead them to the majestic Castle Corona, where their lives may be transformed forever.

In Milan to attend the unveiling of a parchment that contains the original recipe for a traditional holiday bread, Geronimo Stilton is shocked when a thief posing as him steals the recipe, forcing him to catch the culprit and clear his name.