Hmm...this one is going to have to simmer a while before I can figure out what I thought of it and how much I liked it.
The ending was a little out there, but the motivations leading up to the murders seemed reasonable. Maria reads as a little too naïve though.
I do sort of feel like I might have to reread it knowing the ending to figure out how much to criticize its shortfalls and whether its shortfalls were only imagined by me due to sloppy reading. I still feel that there's no reason to declare that CPR won't work in low gravity and there were some awkward phrasings, like "heavy gravity".