Was one of the agents who testified to a grand jury about Monica Lewisnky

Complained about her behavior and 'out of hours' access to the West Wing 

Releasing book so voters understand the 'real' Clinton before the election

Reports say his expose is causing deep concern in the White House 

The release of the book comes a month before the Democratic convention 

Secret Service agents have openly discussed protecting Hillary in the past 

Investigative journalist Ron Kessler said agents detested Hillary