Peter Mounier , May 12, 2008; 12:45 p.m.
I have that encyclopedia so maybe I can help you. It' not exactly a coffee table book, since it has 20 volumes. I'd describe it as a 60's version of a "Time/Life" series. It touches on all aspects of photography, and goes into some depth on some subjects, but it's not really a reference book or a history book. There are biographies, how-to's, entries on different processes, entries on the equipment of the day. There is everything from cat photography to skin poisoning from developers. There are entries on rangefinder cameras and reflex cameras and view cameras, but not so much on specific individual cameras or their histories. There is a beginners guide to developing and printing. I can go on and on. I Googled..
"encyclopedia of photography" + "willard d. morgan" (all one search term)
and found lots of these books for pretty cheap. How much was your opportunity going to cost? I saw it for as little as $50. Where are you located? With 20 volumes, it's hard to describe. There is so much info in the books (some still relevant), I don't know where to stop.