Thea Sisters is a popular children's book series created by Elisabetta Dami. The series follows a group of five friends—Thea, Paulina, Brittany, Violet, and Nicky—who are students at Mouseford Academy. Together, they embark on various adventures, solving mysteries and learning valuable lessons about friendship and teamwork. The books are set in the fictional world of Mouse Island and are known for their engaging stories and colorful illustrations. Each story often includes themes of courage, creativity, and the importance of helping others, making them appealing to young readers.