“If you look at Hemingway’s prose and the writing he did about war, it was as radical in its time as anything we have seen since,” wrote critic Gail Caldwell, quoted by Thomas Putnam in 2006 in a piece about Hemingway’s wartime experience and writing. But the prose did not come as simply as it may look. For A Farewell to Arms, his best-known war novel, Hemingway wrote at least 47 versions of the ending. The version he published in 1929 becomes public domain in 51 days. #PublicDomainDayCountdown