This fourth book in the Freddie the Frog series teaches six note names and completes the treble staff introduced in Freddie the Frog and the Thump in the Night. Freddie and Eli discover a buggy world under the azaleas. The two friends join the Blue Beetle Bugs in their quest to find the secret on Crater Island, (middle C)! Freddie the Frog and the Secret of Crater Island includes peek-through pages and an enclosed audio CD with the dramatized story, sing-along songs, and jam tracks to play along wih the 12-bar blues. Ages 4-9.