A Moon for the Misbegotten, produced in 1947, was written by O'Neill as a eulogy for his brother, Jamie, who is fictionalized as Jamie Tyrone m the play. As he is in Long Day's Journey into Night, Jamie is an alcoholic who seeks solace in the arms of a series of large women. The play deals with his hapless affair with Josie Hogan. It was a work that O'Neill finally came to loathe, possibly because his own son followed in his uncle's footsteps and committed suicide.

Trouble in the Flesh (1959), is Max Wylie's graphic fictional account of Seton Farrier, whose life as the greatest dramatist of his day is clearly based on O'Neill's biography.

East of Eden (1952), John Steinbeck's fictional saga of the Trask family investigates themes parallel to those treated in Long Day's Journey into Night. Based on the biblical...