You wouldn't beleive what I just did. I finished two books during the weekend. They are both about Knowledge Management.
The first one is "The Lost Knowledge" by David W. DeLong. It's about the loosing of staffs through retirements as well as other means. It's unbelievable to know the truth that NASA had already forgotten how they put the man on the moon in the first place. The knowledge was lost due to the suspension of Apollo projects and the Baby Boomer are retiring from NASA. The book is worth reading. It gives you many techniques in retaining knowledge before it's too late, including the way to retrieve the lost knowledge.
The other is "The Corporate Blogging Book" by Debbie Weil. It's really every aspect of putting Blog into your organization. It give tips on how to write a good blog and the rule of thumb of what the blog will brings when deploying it. A web2.0 deployment enabler must read.