What is the author's style in To Have and Have Not by Ernest Hemingway?

Hemingway varies his style by using different types of narration. In Part 1, protagonist Harry Morgan's speaks in the first person, assuming a reader who is familiar with the Cuban waterfront and Gulf Stream. Part 2 is told in the third person omniscient by a neutral narrator. Dialog between Morgan and his ship mate, Wesley, fills much of these chapters, and in Part 3, the narrator twice enters a character's stream-of-consciousness to such an extent that the character takes over as de facto narrator.