Philip Glass' autobiographical book Music By Philip Glass covers the period between 1965 and 1985. It starts with his involvement in progressive theater in New York in the 60s, especially with the Mabou Mines theatre group. After this brief introduction, the three main sections of the book regard Glass' three large-scale operas from the period: Einstein On the Beach, Satyagraha, and Akhnaten. He writes in-depth about the development process, the rehearsals and somewhat about the musical material that went into each work.
The book is clearly presented and without fluff. We are shown behind the curtain of one of the great composers of our time. It is invaluable to read Glass' own words and perspectives about music and theatre.