She Is the End

Relai went to sleep thinking she'd wake up home, on Arden, and face her father the King after four years away.
She never even left Earth's atmosphere.
She could give up (it's what she did before, after all), but this time she's not the only one getting hurt. Someone is ruling in her name, pushing the four planets of the Vada Coalition toward war, and they're killing anyone who resists—people like Milo Hemm's family. But of all those harmed by the false queen, Milo is the only one who managed to track Relai down.
He won't be the only one to nearly kill her.

An epic spanning the galaxy, She Is the End follows a ragged group of heroes who must learn to love each other more deeply than they tear each other apart.