Stephen Coonts Saucer Series: Books 1-3: Saucer, Saucer: The Conquest, Saucer: Savage Planet

SAUCER
When Rip Cantrell, a seismic survey worker in the Sahara, finds a piece of metal entombed in the sandstone, it isn't long before he uncovers a flying saucer that has been resting there for 140,000 years. His discovery doesn’t remain a secret for long. The U.S. Air Force sends a UFO investigation team, which arrives minutes before a team sent by an Australian billionaire to steal the saucer’s secrets. Before either side can outwit the other, the Libyan military arrives.…