This document provides a list of references related to reading about essential and indicative topics in music. The references cover a wide range of subjects including improvisation, avant-garde performance, electronic music, experimental music, sound art, acoustic instrument design, soundscapes, and more. Books by notable composers and thinkers such as Cage, Schafer, Nyman, Adorno, and others are referenced. The list appears to serve as a guide for further research on creative and experimental forms of music.