Anathem by Neal Stephenson is superb and I recommend you carve out some time to really let it soak in. Anything by Neal is phenomenal, but Anathem stands out for me.
Aurora by Kim Stanley Robinson is my favorite sci-fi book I've read in a while. Generation ships, AI, and a fascinating narrative perspective. I'm a sucker for realistic/hard scifi with well-researched technical explanations, and KSR is among the best.