"Welcome to the sleepy island of Penfurzy, where nothing exciting ever really happens. OR DOES IT? Adventure awaits Demelza and her new best friend in the whole world, Nessa, as they explore the island and uncover the mysteries of the Penfurzy Knights. With a honking pet goose sidekick, quirky islanders and a legendary treasure to find, it's up to Nessa and Demelza to ride their bikes, solve the puzzles before them, and face down danger with frisbees, water-balloons, feathers ... and a toilet plunger."--Publisher's description