The Bone Season (The Bone Season, #1) - Samantha Shannon

It is the year 2059. Several major world cities are under the control of a security force called Scion. Paige Mahoney works in the criminal underworld of Scion London, part of a secret cell known as the Seven Seals. The work she does is unusual: scouting for information by breaking into others’ minds. Paige is a dreamwalker, a rare kind of clairvoyant, and in this world, the voyants commit treason simply by breathing.