- - Two kingdoms at war.
- - Sirens and mermaids.
- - Enemies falling in love.
- - The main character questioning her violent upbringing (nature vs nurture).
But most awesomely? STANDALONE! I love series, but it was super refreshing to read a complete story in just one book. No cliffhangers, and a satisfying ending that wrapped everything up pretty well.
It was missing a little X-factor that would have helped me give it five stars, but I still enjoyed it a lot.