I should have liked this book more than I did. It has all my favorite sci-fi themes: it covers a vast array of actual sciences, takes a stab at near-future political projections --it even has good doses of cli-fi and feminism mixed in there. However, I had a hard time staying on board, especially towards the end when things get twisty and just kinda wacky. I liked that Brin tackles his story from many angles, but there were certain ones that just didn't make sense to me as a part of the whole story.