Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Well Organized, Challenging, and Fun

Solving problems of the type presented in this book is a great way to improve your game. This book helps enormously with (a) categorized problems according to game stage (opening, middle, end game) and (b) problems shown in order of difficulty. The problems are excellent, challenging, and fun to solve. Highly recommended as an adjunct to study with other books such as Pask and Reinfeld.My only criticism is small: The fold-out checker board at the end, an obvious but silly marketing gimmick, isn't even square!(Pike's other problem book, Little Giant Encyclopedia of Checker Puzzles, is also excellent.)