I'm just starting to wade into the aesthetics, techniques, and materials around collaging. I already have a pretty good idea. I want to collage primarily with found print materials, watercolors, pencils, and ink, so a lot here wasn't relevant to me. But it was great to be exposed to so many examples and possibilities. Since I purchased my copy, it will now serve as an excellent resource for ideas when I'm looking for inspiration.
The only real drawbacks are that it feels really dated in its aesthetics (nineties), and the color images are pretty low quality, which makes it difficult to see some detail in the examples.
Still highly recommended, especially if you can find a used copy.