Question: What was the name of the novel which later became a 1948 drama film starring Irene Dunne?

Context articles: Irene Dunne
Back Street (1932 film)
Edward Snyder (cinematographer)
The Awful Truth
Over 21
An Affair to Remember
The Age of Innocence (1934 film)
Ann Vickers (film)
Ann Vickers
I Remember Mama (film)

Irene Dunne (born Irene Marie Dunn, December 20, 1898 – September 4, 1990) was an American film actress and singer of the 1930s, 1940s and early 1950s.
 Dunne was nominated five times for the Academy Award for Best Actress, for her performances in "Cimarron" (1931), "Theodora Goes Wild" (1936), "The Awful Truth" (1937), "Love Affair" (1939) and "I Remember Mama" (1948).
 In 1985, Dunne was given Kennedy Center Honors for her services to the arts.
Back Street is a 1932 American Pre-Code drama film directed by John M. Stahl and starring Irene Dunne and John Boles.
 Based on the best-selling novel of the same name by Fannie Hurst, it tells the story of a woman who spends her life as the secret mistress of a wealthy married man.
 This was the first of three film versions of Hurst's novel; remakes were released in 1941 and 1961.
Edward Snyder, also known as Edward J. Snyder (1895 – July 10, 1982) was an American cameraman, cinematographer (director of photography), and visual effects/special effects artist.
 Born in New York City in 1895, Snyder would break into the film industry as the Director of Photography on the 1926 silent film, "The Fighting Marine", which featured the only screen performance by boxing heavyweight champion, Gene Tunney.
 He would be one of the plethora of talented cameramen to work on the Howard Hughes' 1930 aerial classic, "Hell's Angels", along with such other notable cameramen and future directors of photography, Paul Ivano, Henry Cronjager and Ernest Laszlo.
 But it was as special effects artist that he would have his greatest success, working on such classic films as Otto Preminger's "Laura"; George Cukor's "Winged Victory"; "The Keys of the Kingdom", starring Gregory Peck; Elia Kazan's A Tree Grows in Brooklyn; Anna and the King of Siam, starring Irene Dunne and Rex Harrison; and 1948's Deep Waters, for which he was nominated for an Academy Award (losing to the special effects team of Portrait of Jennie).
 Snyder died in 1982.
The Awful Truth is a 1937 American screwball comedy film starring Irene Dunne and Cary Grant.
 The plot concerns the machinations of a soon-to-be-divorced couple, played by Dunne and Grant, who go to great lengths to try to ruin each other's romantic escapades.
 The film was directed by Leo McCarey (who won the Academy Award for Best Director) and was written by Viña Delmar, with uncredited assistance from Sidney Buchman and McCarey, from the 1922 play by Arthur Richman.
 This was the first of two films that Cary Grant and Ralph Bellamy appeared in together, the second being "His Girl Friday" (1940) and the first of three wherein Irene Dunne starred with Grant, the others being "My Favorite Wife " (1940) and "Penny Serenade" (1941).
Over 21 is a 1945 comedy film starring Irene Dunne as a wife who supports her husband's decision to enlist in the army for World War II over the objections of his boss.
 It was based on the play of the same name by Ruth Gordon.
An Affair to Remember is a 1957 American romance film starring Cary Grant and Deborah Kerr, directed by Leo McCarey and filmed in CinemaScope and DeLuxe Color.
 It was distributed by 20th Century Fox.
 The film is considered one of the most romantic movies of all time, according to the American Film Institute.
 The film was a remake of McCarey's 1939 film "Love Affair", starring Irene Dunne and Charles Boyer.
The Age of Innocence (1934) is an American drama film directed by Philip Moeller and starring Irene Dunne, John Boles and Lionel Atwill.
 The film is an adaptation of the novel "The Age of Innocence" by Edith Wharton, set in the fashionable New York society of the 1870s.
 Prolific on Broadway, Philip Moeller directed only two films: this, and the 1935 "Break of Hearts" with Katharine Hepburn.
Ann Vickers is a 1933 American Pre-Code romantic drama, starring Irene Dunne and Walter Huston.
 It is based on the novel of the same name by Sinclair Lewis.
Ann Vickers is a 1933 novel by Sinclair Lewis.
 It is made into a 1933 drama film of the same name directed by John Cromwell, adapted by Jane Murfin, and starring Irene Dunne, Bruce Cabot, Walter Huston, and Conrad Nagel.
I Remember Mama is a 1948 American drama film directed by George Stevens from a screenplay by DeWitt Bodeen, whose work was adapted from John Van Druten's eponymous stage play.
 Druten, in turn, had based his play on Kathryn Forbes' novel "Mama's Bank Account", which was originally published by Harcourt Brace in 1943.
 The story in all its variant forms recounts the everyday life and economic struggles of a Norwegian immigrant family in San Francisco in the early 20th century.
 The film stars Irene Dunne in the titular role, as well as Barbara Bel Geddes, Oskar Homolka, Ellen Corby and Philip Dorn.
 Homolka portrays Uncle Chris in the film, a role he had performed earlier in the Broadway production.