Kraig's book is the best introduction to Western Sex Magick I have read. In fact, I think it is one of the best books on magick, period. He cuts through all the jive and gibberish and gets down to cases about magickal practice. His writing is straghtforward, clear, and easy to read.
He discusses the history of Western Sex Magick (WSM) early in the book, and I find his grasp of this history to be interesting and enlightening. Considering the great deal of obfuscation, ego trips, and other impediments to a clear transmission of knowledge in these areas, I find his work to be refreshing and practical. He is not elitist, didactic, or sectarian in his approach, and discusses difficult subjects such as the use of S&M in magick openly and honestly.
This is not a tour de force of all magick, nor is it intended to be. It is a good introduction to the use of erotic energy in magickal/spiritual practice from a primarily Western standpoint. Tantra and Taoist practices are mentioned as they relate to these practices, but are not the focus of the book. There is a nice glossary and a seven page Bibliography, in addition to the other resources mentioned throughout the text.
Someone with experience in other areas of magick seeking to add erotic energy to their current practices would find this book helpful. I don't know that I would consider this an entry-level book for magick in general. Having explored various practices for over 30 years, I find it difficult to approach these things as a complete beginner, although I am by no means an expert. My experiences tend to agree with his. I am comfortable with Kraig's ideas, and my "inner compass" leads me to trust him. I liked the book, and while I didn't agree with everything in it, found it to have a high proportion of useful information.
Of course, all the usual caveats apply. As with all powerful technologies, one must understand and respect one's tools in order to use them safely. (no humor intended)