Sentinel. The Duchess Report, #2

Sen·ti·nelnoun /sen-t?-n?/A person guarding or watching over other or thingsHer experience as a successful investigative journalist has taught Bree Reuben never to accept things or people at face value. David Svensson is definitely not someone to be blindly believed when he keeps insisting that he's a mere negotiator. Yet Bree's gut is telling her she can trust him. After nearly being killed, Bree accepts that the case that had been dropped in her lap is much bigger than she can-or should-handle on her own.
In a surprising turn of events, Bree's search for Tattoo Guy and Duchess' identity merges with David's hunt for a serial killer. Eager to find answers to the growing pile of questions, Bree accepts David's help as they make their way to Serbia. The urgency of uncovering Duchess' imminent and brutal plan now wars with the race to stop a prolific serial killer from adding another woman to his list of victims.