This pack contains just the ChordBuddy device that clamps on to most right-handed electric and acoustic guitars. The instructional material and songbooks are part of the ChordBuddy Guitar Learning System that are sold as a pack (HL#139936). This device by itself can support classrooms settings where books are sold separately or if someone wants to test out the device on their guitar first to see how it operates. A ChordBuddy device for classical guitars HL#146969 is also available for guitars whose necks are wider - about 1-7/8 inches - than normal guitars. Click here for a video clip from a TV interview including a ChordBuddy demonstration