We have no way of knowing how many people have read any specific book. These are 20 of history’s most popular books based on sales, distribution, and circulation. How many have you read? I’ve read only 9 so far.

1. The Bible – around 40 authors: ~5-7 billion copies
2. The Quran – Muhammad: ~800 million copies
3. Quotations from Chairman Mao Tse-tung: ~800 million copies
4. Don Quixote – Miguel de Cervantes: ~500 million copies
5. A Tale of Two Cities – Charles Dickens: ~200 million copies
6. The Little Prince – Antoine de Saint-Exupéry: ~200 million copies
7. The Lord of the Rings – J.R.R. Tolkien: ~150 million copies
8. The Book of Mormon – Joseph Smith: ~200 million copies
9. Harry Potter and the Philosopher’s Stone – J.K. Rowling: ~120 million copies
10. The Hobbit – J.R.R. Tolkien: ~100 million copies
11. And Then There Were None – Agatha Christie: ~100 million copies
12. Dream of the Red Chamber – Cao Xueqin: ~100 million copies
13. Alice’s Adventures in Wonderland – Lewis Carroll: ~100 million copies
14. The Lion, the Witch and the Wardrobe – C.S. Lewis: ~120 million copies
15. The Alchemist – Paulo Coelho: ~150 million copies
16. The Da Vinci Code – Dan Brown: ~80 million copies
17. The Catcher in the Rye – J.D. Salinger: ~65 million copies
18. Anne of Green Gables – L.M. Montgomery: ~50 million copies
19. Black Beauty – Anna Sewell: ~50 million copies
20. The Very Hungry Caterpillar – Eric Carle: ~55 million copies