The Meyer Sound Design Reference is definitely worth owning if you’re still practicing the basics. I have it and Bob McCarthy’s newer book, Sound Systems – Design and Optimization in my library. Together they paint a pretty clear picture. I like the black and white nature of MSDR and the color nature of SSDO.

Here is a link to the actual MSDR book.

Meyer Sound – Meyer Sound Design Reference book
MSDR – Table of Contents
MSDR – The Goals and Challenges of Sound Reinforcement
(c) Meyer Sound 1998