Contents (view Concise Listing)

• ix • Introduction (The Expert Dreamers) • (1962) • essay by Frederik Pohl
• 1 • At the End of the Orbit • (1961) • short story by Arthur C. Clarke (variant of Hate)
• 21 • On the Feasibility of Coal-Driven Power Stations • (1956) • short story by O. R. Frisch
• 25 • A Feast of Demons • (1958) • novelette by William Morrison
• 51 • The Heart on the Other Side • short story by George Gamow
• 62 • Lenny • [Susan Calvin] • (1958) • short story by Isaac Asimov
• 80 • The Singers • (1956) • short story by W. Grey Walter
• 84 • The Invasion • (1940) • novelette by Willy Ley [as by Robert Willey]
• 102 • To Explain Mrs. Thompson • (1951) • short story by R. S. Richardson [as by Philip Latham]
• 125 • Adrift on the Policy Level • (1959) • short story by Chan Davis [as by Chandler Davis]
• 149 • The Black Cloud (Excerpt) • (1957) • short fiction by Fred Hoyle
• 167 • Chain Reaction • (1956) • short story by Lyle G. Boyd and William C. Boyd [as by Boyd Ellanby]
• 183 • The Miracle of the Broom Closet • (1952) • short story by Norbert Wiener [as by W. Norbert]
• 190 • Heavy Planet • (1939) • short story by Milton A. Rothman [as by Lee Gregor]
• 203 • The Test Stand • (1955) • short story by G. Harry Stine [as by Lee Correy]
• 217 • Amateur in Chancery • (1961) • short story by George O. Smith
• 235 • The Mark Gable Foundation • (1961) • short story by Leo Szilard