These are the great majority of the books discussed in "A Companion to the Modern American Novel 1900–1950" (John T. Matthews, 2009). Alphabetical by author's surname.
As will become obvious, not all the books were actually published in the stated period, thus suggesting they influenced works or were influenced by works in that era.
Does the following, spoken by a Hollywood producer, seem familiar? From Samuel Merwin's Hattie of Hollywood (1922).
'"Now, my dear," he said, taking her hand and playing with her soft little fingers as he
spoke, "you and I had better understand each other right at the start. If you'll do exactly
as I say – place yourself unquestioningly in my hands – I will make you. If you won't,
I can't help you."'