The English dominate this.
A Tale of Two Cities Charles Dickens English 1859 over 200 million[1]
The Lord of the Rings J. R. R. Tolkien English 1954–1955 150 million[2]
The Hobbit J. R. R. Tolkien English 1937 over 100 million[3]
红楼梦 (Dream of the Red Chamber) Cao Xueqin Chinese 1759-1791 over 100 million [4]
And Then There Were None Agatha Christie English 1939 100 million[5]
Data from here: http://en.wikipedia.org/wiki/List_of_best-selling_books
I always figured LotR and The Hobbit were up very high but I never realized they were this high.
Please note this list does not include the Bible, Koran or similar text.