Originally published: William Collins, 1988. Originally published: London: Collins, 1968. Originally published: London : Collins, 1983. Originally published: London: Collins, 1968 Originally published: London: Collins, 1976. Originally published: London: Collins, 1995. Originally published: London: William Collins, 1970 Originally published: William Heinemann, 1983 Originally published London: Collins, 1987 Originally published: London : Collins, 1968