The book takes you on a journey Portugal. Geronimo Stilton and his family were invited to Libson, Portugal to retrae the journey of the great explorer, Vasco da Gama.
He was the first European to reach India by sea and was apparently an ancestor of the Stilton family.
But once they got on the boat someone was trying to sabotage the journey.
Could Geronimo and his familly figure out who is tring to sabotage it before it is to late?
What did I like about the book?
I thought it was very funny that Geronimo Stilton always fell overboard. He fell overboard twice in the book. It was very funny.