"Frisky Fools a Troll" is the second book in the "Adventures of Frisky" series. Boo needs help. Her cousin, Crystal has fallen and bent a wing. Only Frisky is large enough to carry her home. On the way to get her, they become lost in the Haunted Forest, and only smart thinking by Boo gets them on the right path. Then they encounter a cliff that Frisky can't climb down. Again, Boo has an idea. They pick up Crystal, and need to take another path home since Frisky can't climb up the cliff.

On the way home there is a bridge that is guarded by a troll that eats anyone who doesn't pay him money. Crystal has a solution for that. You can read the book to find out how it ends.