Bible Tops America's 10 Favorite Books of All Time

"The results may come as no surprise considering statistics that reflect how plentiful Bibles are in the nation. An estimated 92 percent of Americans own a Bible and the average household owns three, a 1993 Barna Research study found. More recent research puts Bible ownership at an average of four per household, which suggest that Bible publishers sell twenty-five million copies a year, according to The New Yorker. But the revered book, a testament to God's enduring love toward mankind, is read by just 45 percent of Americans in a typical week, the Barna Research Group reported two years ago.

[...]
America's Top 10 Favorite Books
1. The Bible
2. Gone with the Wind, by Margaret Mitchell
3. Lord of the Rings (series), by J.R.R. Tolkien
4. Harry Potter (series), by J.K. Rowling
5. The Stand, by Stephen King
6. The Da Vinci Code, by Dan Brown
7. To Kill a Mockingbird, by Harper Lee
8. Angels and Demons, by Dan Brown
9. Atlas Shrugged, by Ayn Rand
10. Catcher in the Rye, by J.D. Salinger

The Christian Post, Apr. 09 2008 (See also: The Harris Poll.)

Unfortunately, there was no percentages mentioned regarding each book. It's worth noting that Atlas Shrugged by the militant Atheist Ayn Rand is #9, but I also think it's interesting to see that while a lot of people think highly of the bible, and apparently read in it, they don't learn a lot from reading it. I guess they keep re-reading John 3:16.
I'll combine some surveys in a graph here:

Sources:

"Only half of American adults can name even one of the four Gospels. Most Americans cannot name the first book of the Bible. Only one-third know that Jesus (no, not Billy Graham) delivered the Sermon on the Mount. A majority of Americans wrongly believe that the Bible says that Jesus was born in Jerusalem. When asked whether the New Testament book of Acts is in the Old Testament, one quarter of Americans say yes. More than a third say that they don’t know. Most Americans don’t know that Jonah is a book in the Bible. Ten percent of Americans believed that Joan of Arc was Noah’s wife."

Stephen Prothero, "Religious Literacy" (page 30)

More Americans Familiar with Big Mac Ingredients than 10 Commandments

(Pics by AndrewMark and abcdz2000 at SXC.hu)