Helping with Research

But which version to use? Both published posthumously after Hemingway's death. On the left, a version of the original published in 1964, and the much newer, revised edition on the right that I bought early in my researches, unaware of the controversy over its release and the way it muddies the waters of Hemingway's intentions rather than, as it claims, being much closer to his intentions for the book he never completed. Things are complicated.