"Harry Potter and the Prisoner of Azkaban; Harry Potter and the Goblet of Fire; Harry Potter and the Order of the Phoenix"
Author: J.K. Rowling
Hardcover/Paperback Sold: 55 million
The third, fourth and fifth installments of the Harry Potter saga are tied for the third best-selling books of all time. Harry Potter's magic transformed Rowling from a mother on public assistance to one of the richest people in the world.