One small word of caution if you read the older version first: for what I assume are copyright reasons around using SCP in a professionally-published book, the new published version has had to strip out all the SCP references and change the names of all the characters, but it is otherwise very close to the old one. There are a handful of new scenes and some other small differences, but many pages and chapters are word-for-word identical apart from the aforementioned name changes.

This could just be a me thing, but I found this incredibly distracting after being so used to the old version, and just couldn't manage to enjoy it. Fortunately I bought the old one as well.

I loved this book. The audiobook is available on spotify and was a great listen.

I'll add that Lena/MMAcevedo[0] is both a wonderful story and terrifying

[0] https://qntm.org/mmacevedo

I hope qntm has the chance to traditionally publish Ra and have it edited as well. I enjoyed the book a lot, but felt it needed a solid once over.

Really enjoyed the novel though! Planning to reread it in the spring.

I love Ra -- Fine Structure is also great!

Ra was a disappointment for me. If you end up rewriting your entire world at the end of the book, it is an intellectual failing to tackle the main issues straight on. Combine it with an mc who suddenly becomes just an idiot walked around and what you end up with is some SV eschatonism. Lots of preaching and ready conclusions, but little to return to later.