In this thrilling collection of stories, John Wyndham, author of the acclaimed classics The Day of the Triffids and The Midwich Cuckoos, conducts ten experiments along the theme of 'I wonder what might happen if . . .'

There's the story of the meteor, which holds much more than meets the eye.
In Chronoclasm a man is pursued by his own future.
We meet a robot with an overactive compassion circuit.
And what happens when the citizens of the future turn the past into a giant theme park?

'One of the few authors whose compulsive readability is a compliment to the intelligence' Spectator