This book is kind of a "state of the field" summary for information search and discovery, a hot topic these days. It covers the concepts of search and discovery, and findability, as well as the technologies that are currently developing and show promise (though it was published in 2005, so it's a bit out of date already). There is some discussion of how to make things findable, the relevance to libraries and information-based institutions, and what knowledge might look like in another few years. I was entertained by a thread arguing against Clay Shirky's blog posts on several matters -- my disagreement with Clay on a recent analysis of Second Life made me appreciate it even more. However, I disagreed with the author a bit on Web 2.0 -- he quoted a number of sources for his view that the 2.0/3.0 distinction was meaningless. I've been using Web 2.0 to mean the personalized, interactive web that we're seeing now, and Web 3D to represent the next step of immersive technology, and I don't think there's anything fuzzy about either of those. Overall, though, I liked the book a lot, and appreciated his copious footnoting and discussion of sources, as well his ability to bring it all together in a relatively small space.