A Song Below Water

 A Song Below Water by Bethany C. Morrow, 288 pages.

Tavia and Effie aren't sisters, but they're like sisters in every way that matters. Except that because they aren't sisters Effie doesn't share the siren blood that Tavia has spent her whole life desperately trying to hide. It also means that nobody in Tavia's family (which is also has Effie's adopted family) has any idea what's going on with the strange magical changes Effie's going through. As the secrets they have to keep mount in a Portland that loves magical beings, just not ones that look like them, the pressure is getting unsustainable. 

I enjoyed this book, although I did find it a little slow. I really liked both Tavia and Effie, although I honestly wanted Morrow to go further with her world building. It felt like the development of the world hadn't been influenced at all by the fact that it's full of magical beings, which I felt was a missed opportunity. But there is a lot that it does very well, and there's definitely some cool things going on in here.