Top 30 Best-Selling Books of all time

These are thought to be the Top Thirty best-selling books of all time with a few numbers approximations along the way.

1 The Bible (+/- 6 billion)
2 The Quotations of Chairman Mao (+/- 900 million)
3 Xinhua Dictionary
4 Scouting for Boys - Robert Baden-Powell (+/- 150 million)
5 The Lord of the Rings - J.R.R. Tolkien
6 Book of Mormon
7 And then there were None - Agatha Christie
8 The Hobbit - J.R.R. Tolkien
9 Dream of the Red Chamber - Cao Xueqin
10 Le Petit Prince - Antoine de Saint-Exupéry (+/- 80 million)
11 The Da Vinci Code - Dan Brown
12 The Catcher in the Rye - J.D. Salinger
13 Think and Grow Rich - Napoleon Hill
14 Merriam-Webster's Collegiate Dictionary
15 Heidis Lehr- und Wanderjahre - Johanna Spyri (+/- 50 million)
16 The Common Sense Book of Baby and Child care - Dr Benjamin Spock
17 Anne of Green Gables - Lucy Maud Montgomery
18 The Hite Report - Shere Hite
19 The Tale of Peter Rabbit - Beatrix Potter
20 Jonathan Livingston Seagull - Richard Bach (+/- 40 million)
21  A Message to Garcia - Elbert Hubbard
22 Roget's Thesaurus - Peter Roget
23 Better Homes and Gardens new Cook Book - Various authors
24 Het Achterhuis - Ann Frank
25 In His Steps, What would Jesus do? - Charles M. Sheldon
26 To Kill a Mockingbird - Harper Lee
27 Valley of the Dolls - Jacqueline Susann
28 Harry Potter and the Deathly Hallows - J.K. Rowling
29 Gone with the Wind - Margaret Mitchell
30 Cien Años de Soledad - Gabriel García Márquez (+/- 30 million)