Kennedy, Dennis. Granville Barker and The Dream of Theatre. Cambridge: CUP, 1985. See also Kennedy's edition of G-B's books.
Purdom, C.B. Harley Granville Barker. Man of the Theatre, Dramatist and Scholar. London: Salisbury Square, 1955.
Salmon, Eric, ed. Granville Barker and His Correspondents. Detroit: Wayne State UP, 1986.
Salmon, Eric. Granville Barker: A Secret Life. Rutherford: Fairleigh Dickinson UP, 1983.