I posted an in-depth review of this book previously but, for some reason, it did not show up here so I will try again. However, this time I will be more brief. This book is excellent but, like the other two books I have by Schaefer, it is riddled with technical errors. There's no excuse for that. The experienced photographer may catch most of the errors but the student probably won't and that could cause some real problems. The section on film testing, for example, has many serious errors.
I find it a bit irritating that Schaefer literally plagiarizes Ansels photography series of books. By that I mean, Schaeffer lifts whole pages, text, illustrations, etc. Some pages even have the same font styles as Ansel's books. If you took away what has been taken from Ansel's books, this book would be a lot slimmer. I have no idea why Schaefer doesn't simply speak for himself. It's fine to make references to Ansel's writings and photography but to copy it is another thing. But the one good thing about that is that the parts that are copied from Adams are at least correct.
This book has large sections on alternative processes. For someone really interested in those processes, the information doesn't have enough depth. However, it is a good overview of those techniques.
The sections on digital imaging are downright funny although that's not Schaeffer's fault. They are so out-of-date that the reader should get a good laugh from them. This book should have stuck with traditional photography because digital photography is changing so fast that it is more suited for periodicals.
If you use this book as a reference for film testing, etc., be very careful. There are so many errors that they can lead you seriously off the path. I have made so many corrections in my book that I might as well have written it myself. I cannot understand why Schaefer didn't have someone proof-read it. And some of the errors are glaring! But if you can identify the errors, you will find some very useful information. Just be careful. It can be very hard to spotin some cases and it could lead to costly mistakes.
All that said, I still think this book is a good addition to my photographic library especially since it is all marked up now with my corrections.