Investigating a murder-suicide at a Newport mansion that houses a respected think tank, Jeremy Logan discovers a secret room in the mansion filled with obscure scientific equipment related to a dangerous top-secret project.

Summoned to a remote oil rig to diagnose a strange medical ailment among the rig workers, ex-Navy physician Peter Crane soon discovers that the condition is linked to the underwater excavation being done at science research station Deep Storm.

"The New York Times bestselling author of The Forgotten Room and Deep Storm is back with a new thriller that follows the trail of a killer who cannot exist. featuring Jeremy Logan, the renowned investigator of the supernatural and fantastic. Legends, no matter how outlandish, are often grounded in reality. This has been the guiding principle behind the exhilarating career of Jeremy Logan, the "enigmologist"--an investigator who specializes in analyzing...