Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Rates 1 "star" only because there is no "0" rating choice

This is, quite obviously, the worst technical book ever written.Save your money to buy a second-hand router, or one of the excellent Cisco press CCIE books if you actually wish to purchase something useful to your study. If nothing else, buy Radia Perlman's seminal *Interconnections* instead of this travesty.Several reviews here mention Mr. Giles' amazing talent as an instructor. Even if that is the case, not a sliver of "talent" is evident in this book.What makes this book even more tragic: I have had the good fortune to take Cisco courses taught by several of the listed contributors. This book does a supreme disservice to their hard-earned reputations as premier instructors.