The Perils of Pierre Book 4, the Trap

This is a series of children's books about Pierre the Fox, Polly the Crow and many of their animal friends, who are always finding trouble around Loon Lake. The children from the Green Cabin, and the animal characters in the stories, unknowingly interact with each other, sharing their adventures. In the fourth book, The Perils of Pierre, The Trap, Pierre and Polly spy on Keenan and Ehren as they dig up an old cabin site. They find some old traps, and to Pierre's surprise he learns not all people are out to hurt animals.