Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent introduction

I own other books by Gadalla and this one is of similar quality, with the exception that this is only 27 pages. With such a small book, it is impossible to cover any subject exhaustively. But, that said, Gadalla manages to provide an excellent introduction to the correlation between Sacred Geometry and Numerology. He also covers how all this fits in with what he terms "Egyptian Harmony". For further study on Egyptian Harmony, read his books "Egyptian Harmony" and "Egyptian Rhythm".This, and Miranda Lundy's "Sacred Geometry", are good first steps on the road to understanding Sacred Geometry. For a more exhaustive study, you can then tackle Leonora Leet's "The Universal Kabbalah". Leet focuses on Sacred Geometry as it relates to the Jewish Kabbalah. Gadalla, by contrast, is of Egyptian descent and, predictably, focuses on ancient Egyptian (Kemet) influences.