Cobalt: Key 44 #2

When Jack's assistant, Trixie, uncovers a lead that seems too good to be true, Jack can't stop himself from leaping headlong into the darkness beyond.

Private detective Jack Cobalt didn't expect to get drawn into such a dangerous investigation, but then, he never could turn down a pretty face. When he discovers that the police aren't following up on important leads, he follows the breadcrumbs to the most haunting crime spree of his career.