Al-Khalili, Jim <br/><br/>
Black holes, wormholes and time machines 

 - 2nd ed. 
 - Boca Raton:  CRC Press,  2012. 
 - xxii, 184p.  ill. ;  24 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9781439885598 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Space and time.<br/>Cosmology.<br/>Black holes (Astronomy)<br/>Space and time -- Popular works.<br/>Cosmology -- Popular works.
<br/><br/><label>Dewey Class. No.: </label>530.11  / ALK