Teradittos!
I'm sure great screenplays can be created from Whittaker Chambers' autobiography Witness and Arthur Koestler's anti-Stalinist novel Darkness at Noon. Why not find a Hollywood studio that would make movies of them? And why not turn M. Stanton Evans' Blacklisted by History, the story of Senator Joe McCarthy, or Ronald Radosh's The Rosenberg File into a documentary?
I’ve been working on an opera based on ‘Darkness At Noon’ for a few years.......
Great book