Murder mystery on a cruise ship, IN SPACE.
so far so mundane, but unsurprisingly from the author it is... Simply really good, with sharp characterisation and wit A "couldn't put it down" book that I zoomed through in a couple of days.

I liked the gender politics of it :not just the progressive world in which it is set, but that the protagonist is almost a husband and wife team, working together and playing to their strengths.