Justin Stillmaker

Murder is a business done in an app. The poisonous city is a place of constant fear and violence. Vicious gangs compete for a chance to even breathe fresh air. This is the world of The Rider and he has one mission: escape.
 In this cyberpunk world, the hitman known as The Rider roams a decayed and toxic city, avoiding execution by rival gangs. He journeys into the near-forgotten natural world one last time as he faces off against a killer who gave up their name for a number.

The air is toxic. Murder is a business. Nature is for the wealthy. But if you're a good enough assassin, you may be offered an escape. Killing to earn his way out, The Rider is targeted by shadowy corporations, revolutionaries, and rival assassins clawing their way towards the same escape.