1997

Kanon, Gregory M “The Great UFO Hoax” (1997) (available on Amazon USA and on Amazon UK)

1970

Keel, John A “UFOs: Operation Trojan Horse” (1970) (available on Amazon USA and on Amazon UK)

1971

Keel, John “Our Haunted Planet” (1971) (available on Amazon USA and on Amazon UK)

1975

Keel, John A “The Cosmic Question” (1975) (available on Amazon USA and on Amazon UK). Formerly published as “The Eighth Tower”

1975

Keel, John A “The Mothman Prophecies” (1975) (available on Amazon USA and on Amazon UK). Later published under the title “Visitors from Space”.

1988

Keel, John A “Disneyland of the Gods” (1988) (available on Amazon USA and on Amazon UK)

1994

Keith, Jim “Black Helicopters over America” (1994) (available on Amazon USA and on Amazon UK)

1994

Keith, Jim “Casebook on Alternative 3” (1994) (available on Amazon USA and on Amazon UK)

1997

Keith, Jim “Black Helicopters II: The Endgame Strategy”

1997

Keith, Jim “Casebook on the Men in Black”