I just bought Artemis, the newest novel by the guy who wrote The Martian. I haven't read it yet, but I'm really excited.
I've read both
The Martian and
Artemis (actually, listened to the latter as an Audiobook) and I cannot recommend them both enough. It's science fiction that's borderline science fact; the level of scientific details in both stories is staggering, but it doesn't bog down the pacing of the story at all. It's just thoroughly well-researched and a fantastic page-turner besides. Exactly what you'd expect from an author who's also a literal rocket scientist!
Big fan of Jaz, the protagonist in Artemis, too. Now that's a smart, resourceful heroine who knows what she wants!
Going from Pratchett to Gaiman, I have to mention Diana Wynne Jones<3 Her Deep Secret has a most amusing section where Nick, one of the main characters, is half-asleep at a convention, waking up at breakfast, which is based entirely on how Gaiman handled mornings X3 (It's also one of my favourite books ever for other reasons - it merges reality and fantasy nicely, and has all the stuff I love about children's books in one meant for adults \o/)
Deep Secret is one of my faves by DWJ. I think I read my copy so many times its covers fell off. It's been a long time since I read it though, so I don't remember much, but I recall it having these wonderful fever-dream-like qualities, being an interdimensional adventure that takes place at a fantasy convention. All the universe-hopping and quest to save all of existence does get kinda confusing, but the characters are strong and their stories are powerful. I'd nearly forgotten until your post reminded me how much I enjoyed it.
...All this to say, I love sci-fi & fantasy mostly. A book I read last year that I really enjoyed was
All The Birds In The Sky by Charlie Jane Anders. It's about the end of the world, and it's also a love story between a magical girl who talks to birds and a genius boy who programmed the world's first sentient AI. It has talking trees, silicon valley startups, magic witch schools, a war for the fate of humanity, and a miracle dating app that tells the future. And it all somehow makes sense in the end! Definitely recommend.