Instruct: Classify Amazon reviews into positive or negative sentiment
Query: buy it used...if you must

This book appears to be lectures the author has given slapped together to make a book. so many of his points are repeated over and over that it became so annoying I couldn't even finish it. The author jumps to bizarre conclusions, gives incorrect information and even though he stresses his research over the years a lot of information is easily found on the internet. His attempts at humor are not funny, they are just strange. I also kept thinking after reading so many times that more information will be posted on his internet site, what was the big hurry to get this book out? Also, why didn't he contact all these experts on the Chinese ship captain he researched until after his book was written? This book is just silly.