Ghost City - John P. Warren - Bog

After the United Earth Nations' government discover alien DNA on meteorites, they commission an interstellar mission to investigate the mystery.
Captain Atina Morgan is selected over her husband, Captain Rodger Davit, for the operation. But after the crew sets off on their mission, their spacecraft - The Mentor - is never heard from again.
Years later, Davit and his crew encounter a dragnet of cosmic forces in deep space, and stumble upon a strange, circular structure. But what is the GHOST CITY, and will they ever find their way back home?