While a graduate student at Cornell University in 1966, he published the book Inquest, an influential critique of the Warren Commission probe into the John F. Kennedy assassination.

[6] In his 1996 book Dossier: The Secret History of Armand Hammer, the author revealed, among other things, how the prolific businessman laundered money to finance espionage for the Soviets in the 1920s and 1930s.

[7][8] In 2017, Edward Jay Epstein was the subject of a documentary, Hall of Mirrors, directed by the sisters Ena and Ines Talakic[9][10] and which premiered at the 55th New York Film Festival.

[11] This covered his most notable articles and books, including close looks at the findings of the Warren Commission, the structure of the diamond industry, the strange career of Armand Hammer, and the inner workings of big-time journalism itself.

Nonetheless, he said "Other whistleblowers have gone to their respective service's inspector general with their concerns; by contrast, Snowden 'got in touch with' agents of the Russian government.