The official descriptions given for this brilliant book are somewhat misleading. Its greatest value is in that Dr. Lehrich presents an excellent look into the study of magic - not in the sense of "studying to do" but rather "studying to understand views on". This is not an occult tome, but a very serious look at how, and in what context, researchers have written on the works of people such as John Dee or Giordano Bruno.
In addition to this, the book is filled with parallels drawn between ways of magical thinking and modern concepts of semiotics, history of science, etc. Thus it becomes an essential look on both the "how" and "why" of studying the works of occult thinkers in a way that takes into account their original situations and world-views.
The Occult Mind is a very heavy read, filled with necessary jargon and highly complex concepts. Lehrich nevertheless uses such terminology and material consistently, and writes extremely well, keeping the book understandable also to readers who are not experts on the occult or the study of religion. It must be said, though, that a person familiar with at least the basics of Dee and Bruno, Yates and Eliade, will get a lot more out of it than a layman reader would.
Given that the book has been written by a person with a clear expertise on the subject, offers multiple perspectives at all times, and is very thorough, it would fit well as a university-level course book on the history of magic for fields such as the study of religion. At the same time, and for the same reasons, it will also be a highly valuable addition to the collection of many a practitioner of the occult.