You can read this novella online here, and it’s good background to have if you’re interested in reading Emrys’ novel, Winter Tide. It helps orientate you and figure out the characters, how they’re related, what they care about, where they’ve been. I paused in reading Winter Tide to read this, and it definitely clarified things. In fact, I liked it more than Winter Tide: it felt better paced, perhaps because it does have to have a beginning, middle and end in a fairly short stretch of words.
It’s beautifully written, as well; both this and Winter Tide are excellent reworkings of Lovecraft’s ideas concerning the Deep Ones, taking away a lot of the horror he held and expressed about anything Other. It stands alone well, even though it serves as a good introduction for Winter Tide. It’s definitely a good way to dip into Emrys’ work to see if you like her style and ideas.