About this book
Helen O'Loy - short story by Lester del Rey
Farewell to the Master - novelette by Harry Bates
Boomerang - short story by Eric Frank Russell (variant of A Great Deal of Power)
Soldier Boy - novelette by Michael Shaara
Almost Human - short story by Robert Bloch
Imposter - short story by Philip K. Dick (variant of Impostor)
Sam Hall - novelette by Poul Anderson
The Macauley Circuit - short story by Robert Silverberg
Robot Dreams - short story by Isaac Asimov