SOLVED. A supernatural book 7 princes and a girl [s]

[Megan]

I read this book about a year ago, I vaguely remember it being about humans/ lower class people and supernatural beings hating each other.

So the main character girl is an assassin who kills supernatural people and she kills someone who has an invite to a sort off hunger games type of game wear the best man wins but she's there to assassinate the 7 princes but she ended up starting to become friends with them.

One prince is a merman but when he is in human form he cant walk because he brothers and dad broke his legs.

[Zenta]

Maybe Greed by Katie May

[Megan]

that's the one, thank you so much