Yes, it's "introductory" in nature, but it's the most comprehensive introduction I've seen to this complex and emerging field. It would make an excellent reference or textbook.
The 5-star content gets 4 stars because of the book's numerous editorial flaws. For example, several illustrations in the text reference color plate images that simply don't exist. And at least a half-dozen works cited in the text don't appear on the reference list. All-in-all, a rather slipshod editing job.
And therein lies the problem. For a single volume book Ware's effort tries to cover too much and some of the chapters are quite weak (chapter 0 and 10). Also, the fact that it was written by a psychologist shows in a good and bad way: human visual cognition is correctly the foundation upon which to build visualisation. Unfortunately the examples and the ideas for implementation are often lacking or poor in quality.
The first edition also has typesetting errors, so be sure to get the second edition.
All in all, it's still a book worth getting if you're in any serious way connected with the practise of visualisation. However, don't expect it to be the bible of the field, as such a thing does not exist (yet).
