(Fretted). Named one of the "Best Mandolin Books of All Time" by BookAuthority.org! Unique arrangements by two skilled arrangers for a beautiful playing result. The book includes access to online audio for download or streaming of recordings of each invention plus separate mandolin and guitar parts. Audio is accessed online using the unique code inside the book and can be streamed or downloaded. The audio files include PLAYBACK+, a multi-functional audio player that allows you to slow down audio without changing pitch, set loop points, change keys, and pan left or right.