Sheet music book from succesful and now newly revised and edited POP DUETS for all serie, where every book of this serie contains selection of known evergreens in two instruments of the same pitch arrangement with rising difficulty level of individual songs (difficulty leve 1-4). All the books of this serie can be mutually combined so you can create a music ensemble from available instruments only for example, where each part can be played by a different instrument. Well-made and very variable serie.