Join Thea Stilton and the Thea Sisters on an adventure packed with
mystery and friendship!
The Thea Sisters are taking a trip to Canada! They have been invited to
do some bird-watching with a group of friends. The girls are enjoying
learning more about Canada and their love for hockey. But during their
trip, one of their group members mysteriously disappears. They set off
to Niagara Falls to find him. Can they solve the mystery?