I bought the book because of its price, and now I know why it sells at that price. It is useless.
Leadbeater didn't seem to know who he was writing for: Masons or public. It couldn't have been for Masons, because it is too inaccurate, incomplete and superficial. It couldn't have been for the public either, because his starting point assumes certain basic knowledge of Masonic terminology and abbreviations.
So in my opinion the book serves no purpose. What's more, is that this is obviously some cheap reprint of another title, because there are quite a number of references to nonexistent colour plates. and yet the book is full of spelling mistakes and other typos.
My advice would be to stay away from this sad book, as there really is absolutely no reason for it to exist, never mind for you to waste money on. Even a little. Now, if you do want to get under the skin, I suggest "Masonry (Beyond the Light)" by William Schnoebelen, who has been a senior Mason and satanist for many years, and whose information isn't as outdated as that of Leadbeater.