I just finished reading this book, and it's probably some of the best sci-fi I've ever seen. It took me about two days to read, interspersed with other life stuff.

I read the first couple appendices first. Technically they're not the intended starting point, but my ADHD brain needed a jump start before I could actually get invested in the story. What better way to do that than to introduce some really cool science and physics?

Both Ra and There Is No Antimemetics Department by the same author are absolutely top-tier works.

I've never seen a story wrapped up in such a satisfying way before Ra. I don't know how, but it delivered every possible thing that I could have wanted. My brain is happy. It's been so long since I've felt that.