A Robert Silverberg omnibus
Silverberg, Robert.
Silverberg, Robert.Master of life and death.
Silverberg, Robert.Invaders from earth.
Silverberg, Robert.Time-hoppers.
London Sidgwick & Jackson
1970
Originally published, New York: Ace Books, 1957
Originally published, New York: Ace Books, 1958
Originally published, New York: Doubleday, 1967; (B68-16606) London: Sidgwick & Jackson, 1968
Contents: Master of life and death. Originally published, New York: Ace Books, 1957. - Invaders from earth. Originally published, New York: Ace Books, 1958. - The time-hoppers. Originally published, New York: Doubleday, 1967; (B68-16606) London: Sidgwick & Jackson, 1968