Introduction (Digits and Dastards) • (1966) • essay by Frederik Pohl The Children of Night • (1964) • novelette by Frederik Pohl The Fiend • (1964) • shortstory by Frederik Pohl Earth Eighteen • (1966) • shortstory by Frederik Pohl Father of the Stars • (1964) • novelette by Frederik Pohl The Five Hells of Orion • (1963) • novelette by Frederik Pohl With Redfern on Capella XII • (1955) • novelette by Frederik Pohl How to Count on Your Fingers • (1956) • essay by Frederik Pohl On Binary Digits and Human Habits • (1962) • essay by Frederik Pohl