(Paperback)

The Thea Sisters visit a friend in Ecuador who runs a chocolate factory that's in the running for a major award for its environmental methods. But suddenly, chocolate production starts to malfunction. Is it sabotage It's up to the Thea Sisters to solve the mystery. Illustrations.

(Paperback)

In this exciting adventure, the Thea Sisters are off to Paris to visit Colette's fashion-designer friend Julie. But when Julie's designs are suddenly stolen, the girls must search the city of Paris to catch the thief and save the fashion show. Full color.

(Paperback)

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