I don't think the new edition of Extreme Programming Explained has had as much exposure as it deserves. I've summarized its key points, and added a bit of review.
http://xp123.com/xplor/xp0502/index.shtml

And a few other reviews at http://xp123.com/books/index.htm:

• Crystal Clear, Alistair Cockburn. Addison-Wesley, 2004.
• Office Kaizen: Transforming Office Operations into a Strategic Competitive Advantage, William Lareau. ASQ, 2003.
• Mapping Inner Space, 2/e, Nancy Margulies with Nusa Maal.