Ernest Hemingway’s personal letters were quite different from his published writings. Cambridge University Press presents collections of Hemingway’s letters and interviews with his son Patrick Hemingway, as well as Hemingway scholars.
Want to learn more about Hemingway’s life? Ernest Hemingway by Jim Whiting is part of the Classic Storytellers series for middle-grade students. It’s a nicely illustrated introduction to his life and works. Another option is the slightly longer biography The Hunt and the Feast: A Life of Ernest Hemingway by John Tessitore. You may find either book at your library, or they may be available at Amazon.com.