This text reveals what is in the X-Files residing in the deepest vaults of the Ministry of Defence. It outlines cases of sightings, together with the government policy and procedure. It also details the Government's response to phenomena like crop circles, animal mutilations and famous sightings such as the Rendelsham Forest case (1980), the Roswell incident, and the sightings of the US supersonic aircraft Aurora which has never been officially denied or otherwise. The book argues that there is a real threat to national security and that not enough is being done about it.