Allen Strange's book is a definitive text on modular synthesis methods, written in a balanced manner that allows those interested in musical concepts and engineering concepts to find the book equally well-ordered. It contains numerous illustrations and diagrams of modules by Moog, ARP, Buchla et al. The book is useful both as a textbook and a reference document and is invaluable for those exploring modular or most any other analog synthesis methods. It is nigh-criminal that such an important work should be allowed to go out of print and someone should pick this back up and reissue it.