Dr. Henshaw had created what he thought was a time travel machine and he had sent guinea pigs through it. But now he needed a human guinea pig to test it with. Christopher Wilkinson thought the whole idea was absurd, until a book that had been sent through the machine came back with a thumb print on it, the fingerprint of Vanessa, his long lost sweetheart! So Wilkinson agreed to the experiment. He stood in the white circle facing the machine as it began to gleam and spin, pulling him down through the tortuous coils of time...

The World of the DreamersIn 1965, when Mariner IV radioed back the vision of Mars as a planet pocked with craters and unlikely to harbor life of any advanced sort, some newspapers wondered how science-fiction writers would take this. But, characteristic of their limitless imaginations, they came up with their own answers.A. Bertram Chandler presented this novel as his particularly challenging response. If Mars is indeed barren, what are we to say of the wonderfully lifelike Mars worlds of H. G. Wells, Edgar Rice Burroughs, Otis Adelbert Kline, and so many others? They are too real to be lost! They must exist somewhere! And so a space expedition heads to that barren and lifeless Mars to find "The Alternate Martians."It's a science-fiction adventure, packed with action, and filled with some unexpected Red Planet surprises!