Information about the Books Its estimated total sales of over 5 billion copies the bible is widely considered to be the best selling book of all time.Since the release of the first novel Harry Potter on 30 June 1997 the books have gained immense popularity as of May 2015 the books have sold more than 450 million copies worldwide.Gone with the Wind was popular with american readers from the onset and was the top American fiction bestseller in the year it was published ans in 1937 as of 2014 a Harris poll found it to be the second favorite book of American readers.