This book needs to come with a Gibilisco-to-English Dictionary. The manner in which the author tries to explain even the most simple of geometric rules, shapes and processes is as complex as one could possibly phrase anything. You can easily get better description that's not nearly as absurdly contrived from Wikipedia, and in order to understand This author you'll need it, as he refuses to draw even the most basic links between different theorems and Rules.

The descriptions/explanations take paragraphs to get through even though a Wiki can sum it up in a single sentence. The literature is heavily peppered with information that has no use to the immediate explanation, much of which isn't even used throughout the entire book.

Bottom Line - Get a different book about Geometry. Even Advanced Geometrics Textbooks are more understandable to novices and those needing a refresher than this atrocity. However, do not take this to mean the entire Demystified series is as poorly written the Algebra book was Fairly well done and a glance at a few others, but I will personally avoid this authors work in the future. ( )