I don't remember what led me to put this on my library hold list, but other than not being speculative, it has strong similarities to my current work-in-progress (aka the moon novel). Dual timelines, with one character known to die from the beginning. Grief in the 'after' timeline. But it is basically a murder mystery, which I don't usually read.
Overall, I liked it. I stayed in bed an hour this morning reading the ending because there were some major twists. I was really happy that I hadn't identified the killer, and even happier with the final twist.