I disagree on your technical books point. Things may change, but most of the technical books I buy (I can't really speak for anyone else), and those in the post

I disagree on your technical books point. Things may change, but most of the technical books I buy (I can't really speak for anyone else), and those in the post, are, for the most part, going to be relevant for years to come. Most of the books are fairly old, and based on the titles they're generic knowledge, even if they implement something using a specific language that may die, the ideas and concepts they contain are still usable. Even the "Work Shelf", which contains the most specific books, probably won't go out of date.