Author: J.K. Rowling
Hardcover/Paperback Sold: 107 million
Published in 1997, "Harry Potter and the Sorcerer's Stone" was Rowling's first book about the bespectacled wizard and his friends. Just before his 11th birthday, Harry, who lives with his horrible aunt and uncle, receives a letter (carried by an owl) inviting him to attend Hogwarts School of Witchcraft and Wizardry. Currently, Sorcerer's Stone is the sixth best-selling book of all time, just behind "The Book of Mormon" by Joseph Smith. The rest, as they say, is history.