Over 20 years old now and showing it's age a bit, but the points and principles are still very valid. This is a good book for anyone who makes anything that other people must use, whether it's documentation or computer games or machinery. The author examines factors that make a good, or bad, design and lays out some basic principles to help guide designers.

I didn't give it 5 stars because it's really getting quite dated in parts - especially the parts talking about computers - and they really should gave done a complete updated revision instead of just slapping a preface on the 2002 edition. Also, I did find the author got a bit repetitive; many of the examples were redundant and the book could probably have been slimmed down quite a bit. It would be nice to see a real new edition of this book with updated examples and a bit more conciseness.