Instruct: Classify Amazon reviews into positive or negative sentiment
Query: worlds worst knife fighting guidebook!

One would expect much more from Rex Applegate...the main plot of the book revolves around how Applegate made a new knife that improved upon the Fairbairn-Sykes knife of World War Two fame; Applegate spends most of the book trying to sell his design, the Applegate-Faibairn combat dagger. The book gives a bit of knife fighting history and a few basic do's and dont's.....my advice, don't.......