Kessler, Ronald  <br/><br/>
In the President's secret service:   behind the scenes with agents in the line of fire and the President's they protect/ 
Ronald Kessler 
 - New York:   Three Rivers Press,   c2010.  
 - xii, 285 pages :   illustrations ;   21 cm. 
<br/><br/>Includes index.<br/> 
<br/><br/><label>ISBN: </label>9780307461360 (pbk.)