"Detectives Rowan Jackman and Marie Evans are told that their IT boss has disappeared. They soon suspect foul play. Orla Cracken, known as Orac, is no ordinary techie; she was once a field agent traveling abroad undercover, working for the government. Meanwhile DC Robbie Melton discovers that two people, both urban explorers, have mysteriously disappeared while out exploring abandoned buildings. One went missing at a disused airfield, but was it a military base, or was it civilian? The gruesome discovery of their decaying bodies found hanging in ancient church ruins bursts the case wide open, and Jackman and Evans are under pressure to find the killer."--,from Amazon.