With the Guitar Book No.12, a series of pedagogical books is completed, aiming to classify and present in the most organized and responsible way the pieces used by guitar students. It includes works for final-year or graduate students at the level of soloist diploma.

The participation of established Greek composers, as well as talented newcomers, has filled the gap of contemporary composers, offering more than 50 new Greek compositions. In this "Encyclopedia," more than 300 works are presented.