* Different Editions: There are countless editions of "Peter Pan" in various languages, formats (hardcover, paperback, ebooks), and even adaptations.
* Sales Tracking: Tracking sales across all publishers, editions, and languages is difficult. Some sales data may not be publicly available.
* Ongoing Sales: The book continues to sell today, so the number is constantly changing.
However, "Peter Pan" is undeniably a beloved classic. It's been translated into numerous languages and has remained in print since its initial publication in 1911. It's safe to say that millions upon millions of copies have been sold.