Time and the Space-Traveller

"Unusually clear. . . . [Time and the Space-Traveller] treats the twin paradox fairly and broadly, everywhere with good sense and good physics. . . . Enjoyable reading for any one with a taste for physical argument." (Scientific American) "I read Time and the Sapce-Traveller with considerable pleasure and am delighted that someone has collected all the material on the clock paradox." (Isaac Asimov) "[Time and the Space-Traveller] makes this interesting debate accessible to the nonspecialist." (Times Literary Supplement) "A thorough and wide-ranging survey. . . . A pleasure to read." (Choice)