Of the books I've read this year, the fiction ones that stand out to me would be:
1. The entire Sprawl Trilogy by Gibson, and the entire Bridge Trilogy, also by Gibson. The former I'd read before (multiple times) while the latter I had not read all the way through until now. Neuromancer I've read probably 7 or 8 times total in my life by now. I'm not as crazy about Gibson's later stuff, but the Sprawl and Bridge books are great.
2. The rest of the HHGTTG "trilogy" besides the first book. I'd read the first book a couple of years ago but never got around to reading the rest until this year. Note that when I say "the rest" I'm excluding that one book that was written by another author after Douglas Adams' passing. I may still read it one day, but I'm not in any hurry to do so.
In terms of non-fiction:
Real-World Reasoning: Toward Scalable, Uncertain Spatiotemporal, Contextual and Causal Inference by Ben Goertzel, Nil Geisweiller, and Lucio Coelho is the stand-out of the lot. How the Mind Works by Steven Pinker and How Can the Human Mind Occur in the Physical Universe? by John R Anderson are also worthy of a mention.