The Quantum Thief: imagine a world (mainly in the local solar system) where all the coolest tech exists. Nanites, uploading your brain to a computer, the ability to control quantum effects, meyacortexes, advanced cryptography, etc. It's hard to read since it's kinda based on hard physics, but very fun. I'm on the second book in the series.

Ninefox Gambit: the physical world (some far off place with a lot of worlds in space) can be controlled by events that occur and the common use of a specific calendar system and using specific formations like a 'spell'. It's basically a heavily math oriented magic system that runs all of the tech in the universe, and different calendar systems have different effects. It's hard to explain here, but a really fun 'sci-fi fantasy' novel.