Ernest Hemingway: A Life Story, by Carlos Baker. New York: Avon Books. $4. 95.

Baker's biography of Hemingway, first published in 1969, is a model of clarity and objectivity. Superbly researched, drawn primarily from manuscript sources (letters, interviews, unpublished works), this sensitive study corrects rumors and misconceptions about Hemingway's life and its relationship to his fiction.