Secret Life of Colors — Steven Savile

Gabriel Rush snaps a photo of a beautiful hooker and is stunned when it develops. On her cheek is the mysterious mark of the Trinity, a mark not present to the naked eye...the same mark scarring mutilated corpses all over New York City. He races to save her, but instead finds himself racing against time to save his future, the woman he loves, and- when the killer is revealed to Gabriel for what it truly is- his own sanity.