Books about United States -- Social life and customs -- 20th century -- Fiction (sorted alphabetically)
- Law-Breakers and Other Stories Robert Grant
- Lifted Masks; stories Susan Glaspell
- Little Citizens: The Humours of School Life Myra Kelly
- Lonely Warrior Claude C. Washburn
- Mary Wollaston Henry Kitchell Webster
- Modern Chronicle — Complete Winston Churchill
- Modern Chronicle — Volume 01 Winston Churchill
- Modern Chronicle — Volume 02 Winston Churchill
- Modern Chronicle — Volume 03 Winston Churchill
- Modern Chronicle — Volume 04 Winston Churchill
- Modern Chronicle — Volume 05 Winston Churchill
- Modern Chronicle — Volume 06 Winston Churchill
- Modern Chronicle — Volume 07 Winston Churchill
- Modern Chronicle — Volume 08 Winston Churchill
- Modern Madonna Caroline Abbot Stanley
- Moon-Face, and Other Stories Jack London
- More Stories of Married Life Mary Stewart Cutting
- Moth Decides: A Novel Edward Alden Jewell
- Motormaniacs Lloyd Osbourne
- Mrs. Balfame: A Novel Gertrude Franklin Horn Atherton
- One Basket Edna Ferber
- painted room Margaret Wilson
- People of the Whirlpool Mabel Osgood Wright
- Plastic Age Percy Marks
- Plowing On Sunday Sterling North