Meaty: Quarantine by Greg Egan. Easily my favorite book so far this year. It starts as a detective story, but then spirals into something much bigger. Forced beliefs, quantum super positions, and the existential dread of repeatedly facing your own non-existence. It's second only to Permutation City in my Egan tier list.

That book led me to Quantum Computing for Everyone. It's good so far, but more work than expected to follow along being that I'm dumb.

Since the question is what are you reading (not what have you read): Ant-Kind by Charlie Kaufman. It's too soon to say if it's good or not, but it has made me laugh out loud several times. I'm about 80 pages in, and it's only just now started to open up into Kaufman's recursive, meta story telling that makes his film stuff so cool.