Winter's Orbit

Sci-fi with a side of romance. Jainan's husband Taam dies in an accident, and so he is quickly married off to Taam's cousin Kiem to maintain the treaty between their two planets. Turns out it's not an accident and a murder-mystery ensues.

There's a bunch of space politics, although Jainan and Kiem are both super bad at politics and just go around revealing all their findings to anyone important (including the Emperor) which kind of seems like political suicide and/or very dangerous.

Regardless it's refreshing to be able to read a romance novel that's not completely trashy, especially in sci-fi (is it just me or is romance is more common in fantasy?) so this was a pleasant read.