What is the world wide sales for lord of the rings books?

As of recent estimates, the "Lord of the Rings" books by J.R.R. Tolkien have sold over 150 million copies worldwide since their original publication. This enduring popularity has made them one of the best-selling book series in history, alongside Tolkien's other works, such as "The Hobbit." The series' success has been bolstered by adaptations into films, games, and other media, further expanding its reach and influence.