Books on the improvement of thinking processes have tended to be complicated and less than useful; the authors of this renowned text emphasize a simple but effective approach. The "Whimbey method" of teaching problem solving is now recognized as an invaluable means of teaching people to think. Problems are followed by their solutions, presented in easy-to-follow steps -- this feature permits students to work without supervision, outside the classroom. The latest edition of this best-selling text covers two new topics: decoding complex instructions, and the uses of pair problem solving.