I have read a lot of technical books (principally windows and c++ related) and really I have NEVER seen a technical book as well written as this one. The book has all the quality I always wanted: 1) it must be thorough: after reading you shouldn't need to read other book or search the web to complete your comprehension: every info you need must be there. 2) it must be clear: there should never be any ambiguity in expressions or situation that requires you to test the info on specific example. You must be able to understand it on first the first reading 3) it must be a pleasant journey: the order of the information should match the normal flow of your thinking and interrogations. The author should guide you so that when you think: "I wonder what would happen in this different situation", the next paragraphs do address that interrogation you have. Again this book does all this extremely well. There is simply no equivalent in the windows world. It makes me learning linux a very pleasant experience. Many many thanks Mr Kerrisk