Originally published: London: Dobson, 1968 Originally published: London: Dobson, 1967 Originally published: London : Collins, 1968 Originally published: London: Collins, 1968 Originally published: London: Collins, 1968. Originally published: London: Dutton, 1996 Originally published: [London] : Collins, 1968 Originally published: London: Hippo, 1996. Originally published: London: Levinson, 1997 Originally published: London: Andersen, 1984