Used book – Oona & Salinger: a novel, Frédéric Beigbeder

"There always comes a time when men seem to await the catastrophe that will solve their problems. These periods are usually called: pre-war. They are rather poorly chosen for falling in love.

In 1940, in New York, a budding writer named Jerry Salinger, 21, met Oona O'Neill, 15, the daughter of America's greatest playwright. Their romance truly began the following summer... a few months before Pearl Harbor. In early 1942, Salinger was called to fight in Europe and Oona went to try her luck in Hollywood.

They never married and had no children." F. B.