Submerged

As senior project manager for his father's construction firm, Perry Sachs has helped build top-secret military installations around the world. Now he learns a secret beyond his imagination—one on which his father's life depends.Forty years before, Henry Sachs and a small group of scientist had studied a mysterious underground bas not built by the U. S. Government—nor any other country, as far as they experts could tell. Concerned by the unexplainable complex on American soil, authorities flooded the site to prevent its creators from every returning.Now, Henry and members of his team are falling, one by one, to a strange, deadly illness. When Perry hears his father whisper the name "Lake Lloyd," he and his team begin a desperate search—for the exact location of Henry's secret mission, for the cause and the cure of his condition, for answers to the decades-old questions Henry has kept hidden inside.