It's hard to calculate how many have been sold bit here. The Bible is the most widely sold/circulated book. https://www.guinnessworldrecords.com/world-records/b

It's hard to calculate how many have been sold bit here. The Bible is the most widely sold/circulated book. https://www.guinnessworldrecords.com/world-records/best-selling-book-of-non-fiction https://www.guinnessworldrecords.com/world-records/best-sell...