Hugh Howey Silo Series ((link)) -

The first book introduces us to Juliette Nichols, a talented mechanic from the "Down Deep." When the Silo’s Sheriff takes the ultimate risk by asking to go outside, Juliette is thrust into a position of authority. Her curiosity leads her to uncover the terrifying truth about the screens that show the dead world outside—and the conspiracies that keep the Silo running. 2. Shift: The Origins of the End

The series is set in a future Earth rendered uninhabitable by an unknown cataclysm. The last ten thousand humans live inside the Silo: a massive, underground cylindrical structure buried half a mile into the earth. hugh howey silo series