Endless Blue Beneath - Shannon K. English
It was not good, unfortunately. Some cool mermaid vibes, but holy hell that ending. Imagine someone committing genocide telling someone who hadn't done anything wrong to 'be better.' Not to mention, it's mostly just miserable the entire time, the main character is insufferable and repeats her thoughts about her brother all the time, and then the love interest was a choice. For what little time was dedicated to her in the first place.
Not sure what I'll read next.