Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A must read for composers & critics

Published in 1972, this book gives a very interesting perspective on the evolution of electronic music. It's not a howto book, or a physics book, but an amazing list of composers and their ifluences, from Schubert, back in the 19th century, to Karlheinz Stockhausen, developing new composition paradigms for future composers.Beyond that, the book reviews various tools and methods develped and used throughout the 20th century and makes the basic concepts of contemporary tools clear.I recommend this book to every composer who would like to get aquainted with the great (although few) electronic composers of the past, their works and their working methods.