Annex The violet wars series, book 1.

"An exciting twist on a hostile-alien-takeover drama...exhilarating."- Washington Post "An energetic, nonstop adventure."- Chicago Tribune Independence Day meets Lord of the Flies in this "thrilling and imaginative" debut about two young outsiders forced to fight off alien invaders in a post-apocalyptic city. (Fonda Lee) When the aliens invade, all seems lost. The world as they know it is destroyed. Their friends are kidnapped....