This is not Daniel Kahneman's book. This is a Guide to Daniel Kahneman's book. This guide includes a review of the key ideas and facts discussed in Daniel Kahneman's book, as well as chapter by chapter summary of Daniel Kahneman's book. The central theme of the book is the discussion of two profoundly different modes of thought that human brain uses in order to apprehend the world. These two different ways of thinking - System 1 and System 2 - have been described in various "dual-process" theories of the brain.