He's the subject of the biographies "Official and Confidential" & "The Man and the Secrets"
[DOC] [TLE] J. Edgar Hoover: The Man and the Secrets: Amazon.de: Curt Gentry ... [PAR] Bei Amazon.de erhltlich: J. Edgar Hoover: The Man and the Secrets - Curt 
Gentry ... Official and Confidential: The Secret Life of J Edgar Hoover ....