The Koran is the most popular book of all time.
The religious text has been translated into 50 different languages, has nearly 400 editions and more than three billion copies have been printed.
The King James Bible is a close runner up, with 2.5 billion copies to its name.
In third place is Quotations from Chairman Mao Tse-tung.
Harry Potter (the entire series, which you could say is kind of cheating) makes it into fifth place, while wildcard The Very Hungry Caterpillar slid into the list among the weighty tomes with 30m copies sold.
The list is ranked by lovereading.com and takes into account the number of editions, translations and copies sold.
See below the top 30 most popular books
