Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 20 pages at the most

This book touches on several subjects without really explaining very many of them. Perhaps written by persons better able to write code than books, the syntax is overly loose and informal. The really useful data in this book would fit about 20 pages. The rest is teaser and fluff, the beginning of an idea without the essence. MacPerl is a wonderful, free tool for the Macintosh, but this book is not worth the price of admission.To sum it all up, its a hack job and a frustrating read.