The subtitle of this book: “Groundbreaking instruments and pioneering designers of electronic music synthesizers” explains a lot about the content...
This neat 300-page book, written in 1993 by Mark Vail, one of the writers of Keyboard magazine, is a very complete overview of 30 years of synthesizer history - from 1962 until 1992.
The book is full with background-stories and funny anecdotes by designers and early users and it is loaded with nice (mostly black and white) pictures.
The buying guide, the giant glossary and the comprehensive index in the back of the book make this book an unmissable read for anyone interested in (analog) synthesizers, sequencers and drum machines.
More info at http://www.markvail.com/