Mainstreet by Sinclair Lewis

The story is set in the small town of Gopher Prairie, Minnesota, a fictionalized version of Sauk Centre, Minnesota, Lewis's hometown. The novel takes place in the 1910s, with references to the start of World War I, the United States' entry into the war, and the years following the end of the war, including the start of Prohibition.

Satirizing small-town life, Main Street is perhaps Sinclair Lewis's most famous book, and led in part to his eventual 1930 Nobel Prize for Literature. It relates the life and struggles of Carol Milford Kennicott as she comes into conflict with the small-town mentality of the residents of Gopher Prairie. Highly acclaimed upon publication, Main Street remains a recognized American classic.  Wikipedia