All of these got five stars from me on Goodreads this year:
The Dirt on Clean: an unsanitized history, by Katherine Ashenburg
Mindless Eating: why we eat more than we think by Brian Wansink
Truthfully, I don’t recall much about either of these, but hey, it was early on and I was feeling generous. I think my book grading criteria have changed. There’s no doubt that I enjoyed them at the time, and if you like non-fiction you probably would too.
Wasteland: stories of the Apocalypse edited by John Joseph Adams. Another “did I read this”? It must have been good.
Virtual Unrealities: the short fiction of Alfred Bester. I’d have given this book five stars for the short story “Fondly Fahrenheit” alone. As soon as I finished reading it, I turned back and read it again. It knocked me on my ass. The other stories were good too.
The Anubis Gates by Tim Powers. The first Tim Powers I’d read; it was a little confusing but I liked it enough to go find more of his stuff. Apparently confusing is his trademark. 
Bonk: The Curious Coupling of Science and Sex by Mary Roach. Good (and mentions Cecil!) but Stiff was better.
And the best of them all: Who Hates Whom: Well-armed fanatics, intractable conflicts, and various things blowing up; a woefully incomplete guide, by Bob Harris. The world situation, explained in little words, and the history of it all. If you read this carefully, you may understand what goes on in the Middle East and elsewhere. I should buy this one.
I can’t resist putting in some honorable mentions that got four stars. These were just as good as some of my five-stars:
*Knockemstiff, Donald Ray Pollock. * Be prepared. Read about it first.
Duma Key, Stephen King. Oh, he’s done a lot better. But it was a comeback of sorts for him, and we were all so glad.
The Once and Future King, T.H. White. I enjoyed this almost every step of the way but wanted a different ending.
Replay, Ken Grimwood. Great story, I was riveted. Knocked off a star for gratuitous sex (but you can handle it).