The Final Equinox

I love this series and these two characters. I like how their narratives alternate to tell the same story. I haven't quite grasped their romantic relationship, but there weren't too many mushy romantic moments (not that either of these characters are mushy, romantic people), so that was good. Sometimes the details are over my head with my lack of math/science knowledge, but it's not written in a pretentious way, just by a man who is basically a genius . . .