I bought this as an Amazon recommendation as I had to learn how to operate a new live (church) PA system (lots of vocals, guitars, keyboard, drums, etc., and a very mixed "audience"). It has both encouraged me and challenged me, and certainly resulted in a better first attempt to use the new system. Well written, easy to understand for the non-technical, and probably more in it than my initial needs. Other books in the series have helped as well. A great investment - inexpensive and comprehensive.