Wikipatterns is the best practical guide to understanding how to harness the potential powerful and transformative effects of a wiki that I have come across in paper-print or via web.
If you're looking for a techno-speak on the mechanics of physically setting up a wiki (i.e., coding, servers, etc), this book is not for you (I'm not a "tech" guy). If you're looking for a guide that outlays why one would want to create a wiki, the benefits to be gained by one, how to invest and rally your organization to supporting wiki, and case studies from organizations and companies that have done it - this is book if for you.
I'm in the process of setting up a wiki and this book helped me anticipate potential adoption challenges, and build my site to account for those. The advice this book gives on how to roll out a wiki, including how to reach out to and manage the participation of early adopters is very much worth reading. I read this book in one sitting.