Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An Essential Read

Foster and Kaplans' analysis of over 1000 companies is an essential read to understand what is happening in the current high tech crisis. Other essential reads are Clayton Christensen's "The Innvoator's Dilemma: When New Technologies Cause Great Firms to Fail" and Reid Watts' "The Slingshot Syndrome: Why America's Leading Technology Firms Fail at Innovation".