Donald Miller is an American author and public speaker, best known for his book, Blue Like Jazz, which explores themes of faith and spirituality. He has written several other books and founded a company called StoryBrand, which helps businesses clarify their messaging through storytelling techniques. In addition to his writing, Miller has been involved in various creative projects, including film and podcasting. He often speaks at conferences and events, sharing insights on personal development and effective communication. His work emphasizes the importance of narrative in both personal and professional contexts.