I'm reading two books at the moment, one "creative nonfiction" and one IT/sysadmin:
Tribe, by Sebastian Junger. Mrs Summer got this for me in a thrift shop. Really liking it so far. The author says the book grew out of an article he wrote for Vanity Fair about PTSD. According to Wikipedia it's going to be about war veterans from an anthropological perspective, although I haven't come that far yet, and it seems to have important insights beyond that somewhat narrow topic.
Run Your Own Mail Server, by Michael W. Lucas. I pre-ordered this book (in e-book format) long before it was completed because I think it's such an important topic. The author is a legend in the open-source software community, and he's written several other well-received books in the IT/sysadmin category in the past. (Edit: He's also the author of the infamous short story (53 pages) Savaged By SystemD: an erotic Unix encounter which is just ... Well, the title says it all!)