Mania (The Night Walkers, #3)

Jack and his half-brother Parker have no time to mourn the loss of their father, Daniel Chipp. With an attack by the body-stealing Takers imminent, the pair must put aside their grief and track down the ingredients of Daniel’s formula—one that will rein in the power-hungry Takers—to keep their family and friends out of danger.

Their only hope lies in a puzzle their father left behind, a riddle where each brother unknowingly possesses a piece of the solution. The puzzle sets them on a deadly path, spiraling between reality and the world of dreams where nothing and no one can be trusted entirely. And when Parker finds himself deep in the fray between the Takers and the other Night Walkers, it’s up to Jack to complete the formula and save his brother’s life.