* No central record: There is no single, comprehensive record tracking the sales of every book by every author throughout history. Sales figures are tracked by publishers, but that information isn't always publicly available.
* Constant sales: Books continue to be sold long after an author's death. Sales figures fluctuate over time, and it's hard to track all those changes.
* Different editions: There are various editions, reprints, and translations of Hemingway's works, further complicating sales tracking.
What we do know:
* Hemingway was a hugely successful author, and his works remain popular today.
* Some of his books, like "The Sun Also Rises" and "For Whom the Bell Tolls," have sold millions of copies.
* His works have been translated into numerous languages, expanding their reach globally.
While an exact number of books sold is elusive, it's safe to say that Hemingway's writing has had a significant impact on literature and continues to be enjoyed by readers worldwide.