Rotten: Revival of the Fittest (Rotten #2)

Zombies! Spies! The Wild West! On assignment to investigate an undead outbreak in the Pacific Northwest of 1877, Agent Wade becomes the quarry in a grueling marathon chase; and in Chicago, Agent Flynn confronts dangerous anti-evolution protestors. Then, the agents race to stop the infection that's turning residents of a religious colony red-skinned, ravenous, and possessed, according to the familiar-looking Father von Becker who has seized control.