The cover art is great, don't you think?
The author shows some knowledge of Jewish sources in the book but seems to be totally ignorant of many others. One very telling quote is when he's talking about pairs in reference to the hour of mars on tuesday and he says "...will recognise that the Talmud considered even numbers to be unfortunate." If he could read the commentary that went along with the section he would have referenced the information on Zugos and where/why they are important. The amount of things that he left out that are elementary are a testiment to why I give this book such a low rating. Of course his Hermetic talk on Kabbalah rather than going to the Jewish sources is just another nail in the coffin.