(Guitar). Concentrating on the melody or harmony of a piece is a great exercise for when you have to do both. For this book, author James Douglas Esmond has chosen a dozen pieces out of the classical domain which are not found in the standard guitar repertoire. The pieces in this book start off fairly easy and progress to more challenging ones for intermediate guitarists. One guitar is great, but two is twice as nice and working with other musicians is great fun. So get together with another guitarist and have a wonderful time discovering these guitar duet pieces! The accompanying CD features 24 tracks.