1
by Däniken, Erich von, 1935-
Published 1992
Book
2
by Hawking, Stephen W.
Published 1995
Book
3
by Liška, Vladimír, 1955-
Published 2001
Book
4
by Liška, Vladimír, 1955-
Published 2003
Book
5
by Highfield, Roger
Published 2003
Book