Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointing

I was very excited to see this book and anxious to read it, but was so disappointed that I gave up without finishing it. This book is in the same genre as several other books, all of which are far superior: Galileo Galilei by Gould, The Map that Changed the World, by Winchester, Fermat's Enigma by Singh, A History of Pi by Beckman, and Isaac Newton by Gleick. My general complaints are that the author is a bit sloppy, inexact, speculative and his math is imprecise. Examples are: speculative (free men built the pyramids and they represent a sunburst in honor of Ra); inexact (use of truncated decimals for phi, etymology of the word sluggish as related to a slug of mass, and derivation of a pyramid of exactly 52 degrees). The paragraph on the top of p.81 on platonic solids is especially confusing. So while he does make some interesting points, it just isn't worth the trouble.