Instruct: Classify a review as either positive or negative.
Query: Not very Technical or Up to Date

This book is really surprisingly still in print. It's from the 70's and it looks like it. Some useful information can be gleaned from it to be overgenerous. I find it rather amusing in fact. The photos inside are absolutely ridiculous. They are clearly examples of "just let me take your picture for this ass of a book I'm writing..." -- the fat couple in lawn chairs is pretty funny (pg. 21). The discussion of the zone system is laughably short and comprises only 5 pages. Most of the discussion centers around mixing various chemicals in various ratios. I wonder if all of these are still available on the market. The drawings in the text are third grade level, and someone actually gets credit on the cover! This is a very poorly done text and I don't recommend it with so many other books out there on this subject matter.