I have read first three chapters and I find it waste of time.  Some of the blog links mentioned in the book are dead/not working anymore.  It is too costly, even the kindle version is around 400/-I do not understand, why the author has mentioned lots of links to blogs. Tell me a summary, I will read it in the book.  It's annoying to type the URL to read the blog posts.Maybe I have read books i.e., Lean Startup, Four-hour workweek, etc. so my expectations were too high.If you will ask me, I will not recommend this to any developer.  It does not worth 400/-.