I have very mixed feelings about this book. On one hand there is a ton of useful information and links in it. On the other hand, it really feels like it was stitched together hurriedly from marketing and conference presentation and never edited. It is full of chatty antidotes and call outs to various managers that add nothing to the book, and a good half of the diagrams are either unreadable in the print edition or plain useless. The author is supposed to be technical, but the book is very shallow for the most part.