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