"A Spy Among Friends: Philly and the Great Betrayal" by Ben Macintyre - UPDATE 2

Kim Philby had started out as a war reporter. He had survived a terrible explosion that had killed many people. After a while of doing great work as war reporter he was promoted to a spy in the German army. However after a while he did not like being on the evil side so he switched to being to the good side and Winston Churchill helped him to become a great spy.