Brotherhood of Kurnak

Twenty thousand years ago distant star travelers came to Earth to colonize and teach. Eight thousand years later they departed for their own stars. While here they built a highly technical time passage. But when they departed the passage was on electronic control. Somewhere down through the centuries the time passage malfunctioned. Now its jerking residents from their timeframe and hurling them into another time. But nobody believes whats unraveling so United States Navy Captain Harry Warren is ordered to find and suppress the ancient device. His team must work through governmental interferences and public disbelievers while the passage threatens to implode.