Cost of Attainment (phrase) The price paid, or the exertion required, to obtain a desired outcome. Carver Carver never expected to end up on an assignment with his ex. He also never expected to be left behind. Clara After her previous assignment, Clara is left picking up the pieces. If she could change things, she would, but some decisions are made far too late. In the thrilling conclusion to the Rules Duology, Carver and Clara learn that every action has a price. While Carver is grappling with the results of his decision, Clara is sent on another assignment. This time, the assignment involves a friend, an enemy, and a stranger.

Will this mission be as devastating as the last?.