Susan was an American Pulitzer Prize-winning playwright, actress, novelist, and journalist. A prolific writer, she composed nine novels, fifteen plays, over fifty short stories, and one biography. With her husband, George Cram Cook, she founded the Provincetown Players, the first modern American theatre company.

Broadway credits include her best-known work, Trifles, and Suppressed Desires (Comedy Theatre), The Comic Artist (Morosco Theatre), Chains of Dew and The Verge (Provincetown Playhouse), A Woman's Honor (Greenwich Village Theatre), and Inheritors and Alison's House—which received the Pulitzer Prize for Drama (Civic Repertory Theatre). Regionally, her produced plays include Tickless Time, Bernice, The Outside, Close the Book, and The People (Provincetown Playhouse).

Screenplay credits include Trifles, A Jury of Her Peers, Motivet, and The Right to Love.

Her best-selling novels include The Glory of the Conquered, The Visioning, Fidelity, Brook Evans, Fugitive’s Return, and the Literary Guild Award-winning The Morning is Near Us.