Eos is book one. Fortitude is book two. Dawn is book three. They're meant to be read in order and are NOT standalones.
Immerse yourself in the dystopian world of the Eos Dawn Series, a trilogy by Jen Guberman. In a post-war California, survivors rebuilt cities. With the population lower than ever, citizens had to resort to exiling criminals. Instead of casting them into desert wasteland, they sent criminals off to ruined towns based on their crimes. When a young thief is exiled to Avid, a town full of thieves, she learns that the bad guys aren’t always who they seem.