Davies, P. C. W. <br/><br/>
How to build a time machine / 
Paul Davies. 
 - 1st American ed. 
 - New York :  Penguin Group,  2003. 
 - 131 p. :  ill. ;  20 cm. 
<br/><br/> Originally published: Great Britain : Allen Lane, Penguin Press, 2001.  Originally published in the U.S.: New York : Viking Penguin, 2002. 
<br/><br/>Includes bibliographical references (p. 127-[128]) and index. 
<br/><br/><label>ISBN: </label>0142001864 (pbk.) :  $12.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Space and time.<br/>Time travel.