One of the best books I've read. A significant part of it (that having to do with philosophy/epistemology) mapped well to my worldview as it was previous to reading it, but better reasoned and much better explained and sourced than my beliefs of course; the remainder was equally enjoyable and considerably mind-expanding.

I've told people close to me that they can read this book if they want to know what I think and believe. In that sense I consider David Deutsch a delegate of mine, in the liquid democracy sense: a better (smarter, more knowledgeable person) that I can trust to have opinions and beliefs compatible with mine.