I'm not exactly the target audience (pretty handy with the front-end already) but I do know a lot of back-end developers who would find immense value in this book. A lot of the help I provide to more back-end focused devs is along the same lines: "here's what we need to do - here's why - here's a library/tool that makes this easier". I've actually been thinking lately about writing a similar book. Kudos to the author for putting this out there!