Which Theodore Dreiser novel inspired A Place in the Sun?

The 1951 film A Place in the Sun, directed by George Stevens, was based on a theatrical adaptation of Theodore Dreiser’s 1925 novel, An American Tragedy.1

The novel is a complex exploration of the life of Clyde Griffiths, a young man whose pursuit of the American dream leads to his eventual trial and execution for murder. In the film adaptation, the protagonist is renamed George Eastman, but the story retains the core themes of Theodore Dreiser’s original work, focusing on the destructive nature of blind ambition and the consequences of dysfunctional relationships.21