Most people know that Ernest Hemingway (1899-1961) was a towering figure of American literature, a Nobel and Pulitzer Prize winner and author of novels including The Sun Also Rises and The Old Man and the Sea. What, perhaps, they don?t know is that he was an ambulance driver in the World War I and suffered 227 shrapnel wounds; that he wrote 47 different endings to A Farewell to Arms; that he hu…