Contents (view Concise Listing)

• 7 • Introduction (Invasions) • [Asimov's Essays: Other's Work] • essay by Isaac Asimov
• 11 • Living Space • (1956) • short story by Isaac Asimov
• 26 • Asylum • (1942) • novella by A. E. van Vogt
• 85 • Exposure • (1950) • short story by Eric Frank Russell
• 104 • Invasion of Privacy • (1970) • novelette by Bob Shaw
• 127 • What Have I Done? • (1952) • short story by Mark Clifton
• 146 • Impostor • (1953) • short story by Philip K. Dick
• 161 • The Soul-Empty Ones • (1951) • novelette by Walter M. Miller, Jr.
• 200 • The Cloud-Men: Being a Foreprint from the London News Sheet #1 • short story by Owen Oliver (variant of The Cloud-Men, Being a Foreprint from the London News Sheet of March 9, 1915 1911)
• 217 • Stone Man • [Berserker (Fred Saberhagen)] • (1967) • novelette by Fred Saberhagen
• 253 • For I Am a Jealous People! • (1954) • novella by Lester del Rey
• 296 • Don't Look Now • (1948) • short story by Henry Kuttner
• 310 • The Certificate • (1959) • short story by Avram Davidson
• 314 • The Alien Rulers • (1968) • novelette by Piers Anthony
• 350 • Squeeze Box • (1959) • short story by Philip E. High
• 365 • The Liberation of Earth • (1953) • short story by William Tenn