Deep in the Nevada desert lies Area 51, a highly classified United States Air Force facility. The base has a long history and has been used to develop spy planes, drones, and other advanced technology. But many believe the base is used for much more. Since it was built in the 1950s, people have reported sightings of flying saucers and aliens in the area. There is still so much we do not know about the secretive base. Explore the real history of Area 51 and the many conspiracy theories that surround it. "Able readers who enjoy historical mysteries and examining all sides of stories will appreciate this series about unexplainable events. . . . Students will relish the tantalizing notion that there are things still unknown about these top secrets."― School Library Journal