Reviewed by Paul Wheaton, January 2000
(8 of 10)
The most popular computer science book of all time. This is the "Gang of Four Book". 23 Design patterns that can be used in any object oriented language. You've probably used a lot of them and never knew it! Now, rather than taking 15 minutes to explain to another engineer what you are trying to do, you can just say "I'll use the state pattern here."