Greek mythology meets The Little Mermaid
The cover of this book grabbed me immediately. The tentacles and sword suggest Greek mythology, and all the talk of sirens in the blurb supports this. It's a watery world of intrigue; the oceans and those who dwell in them are ruthless, and the enemies of humankind. The comparisons with Sarah J Maas and Leigh Bardugo are sure to make this a hit with the YA fantasy fans.