From the back cover:
Each of the three tales of imagination in this book is by a master of the art, and in each there is incident and invention enough to surpass most full-length novels.
"Envoy Extraordinary" by William Golding tells of a barbarian genius who arrives in ancient Rome with three inventions -- and the results are appalling.
"Consider Her Ways" by John Wyndham presents a shocking and utterly convincing picture of a world of women -- without men.
"Boy in Darkness" by Mervyn Peake is a venture into a dream-like world of strangeness and terror -- quite unlike anything you have ever read, and unforgettable.