Area 51 relates to humanity encountering aliens, and the trials that ensue. Written using the pen name "Robert Doherty":
Area 51 (1997) In the first book of the series it is established that during the 1940s several atmospheric crafts of unknown origin were discovered in the Antarctic and the U.S. government established Area 51 to study the technology. In the 1990s, several of the book characters, including Scientist Lisa Duncan and Special Forces officer Mike Turcotte, are drawn to Area 51 at the same time and they must unlock the secret of the ship to save mankind.
Area 51: The Reply (1998) The secrets of the alien craft extend beyond Area 51 from Egypt's Pyramids to the mysterious face on Mars.
Area 51: The Mission (1999) From a place hidden in the Amazon rain forest, comes a deadly virus that threatens the world.
Area 51: The Sphinx (2000) Someone has unlocked the secret of the Sphinx and using the alien technology found there, they threaten to deploy a nuclear missile.
Area 51: The Grail (2001) Area 51 personnel are searching for the Holy Grail, an ancient artifact that might unlock further secrets of the alien technology and save the world.
Area 51: Excalibur (2002)
Area 51: The Truth (2003) Turcotte discovers the origins of man and why the aliens came to earth to begin with.
Area 51: Nosferatu (2003) The undead creatures who have inhabited the earth are now armed with modern tools of destruction, and they know that it is time to follow their leader, Nosferatu, to take over the world.
Area 51: Legend (2004) From another planet, two humans who have already successfully led a revolt against the deathless alien race, are on their way to a planet called Earth for a final show down.
