I bought a few origami books on impulse today, Folding Techniques for Designers was among them so that's a good validation. I've vaguely wanted to make a fancy folded paper lamp for a while and seeing this on HN crystalized that desire into at least buying a handful of books. Thanks for the reference!
I bought Folding Techniques for Designers: From Sheet to Form by Paul Jackson on a whim several years ago and found it fun to work through. I think he has a new edition and some other books but I don't have any experience with them.