Answer
Anthony Summers, a noted investigative journalist, has tackled the contentious "Hiss controversy" in his book. According to Summers' research, the case involving Alger Hiss, a former U.S. State Department official, was marked by complex allegations of espionage during the Cold War era. Summers' work aims to shed light on the various dimensions of the controversy, including the accusations, investigations, and debates that surrounded the Hiss case.