Andrew Hodges <br/><br/>
Alan Turing - the Enigma 

 -  Simon & Schuster 
 - 587 pages 
<br/><br/>  
<br/><br/><label>ISBN: </label>9780671492076 
<br/><br/><label>Standard No.: </label>10020685 
<br/><br/><label>LCCN: </label>83019149 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biography
<br/><br/><label>LC Class. No.: </label>QA29.T8 
<br/><br/><label>Dewey Class. No.: </label>510.92