Constance and Gwenyth Little
The Grey Mist Murders takes place on a cruise ship, and is told in first person by sassy, quick-witted Carla. Two young women are strangled, and one more (the narrator) nearly murdered as well.
This is the first mystery written by the Little sisters, and it lacks the sparkle of their later works. As with all their mysteries, this one is a light mystery with humor and a bit of romance, but in other parts it is dry, and there were times when it was a chore to read. The plot was interesting, but the conclusion not fully believable, and the amount of evidence the hero was able to piece together was far fetched as well.
This is not a good example of the talent of the Little sisters. If I had read it first, I would probably not have tried another one. I suggest that this one be skipped by all but the most dedicated of the Little fans, and then read it as an experience to see how much they grew over their career.
(I recommend the Black-Headed Pins, the Black Honeymoon or the Black Coat for first time Little readers.)