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20 Best-Selling Children’s Books of All Time


5
"Harry Potter and the Deathly Hallows"
Harry Potter and the Deathly Hallows
Harry Potter and the Deathly Hallows
Image courtesy of Scholastic

Author: J.K. Rowling

Hardcover/Paperback Sold: 44 million

We're not going to spoil the ending if you haven't read the last Harry Potter title, in which Harry confronts He-Who-Must-Not-Be-Named. When it went on sale in 2007, the book sold 15 million copies in the first 24 hours [source: Forbes].