Portal:Books/DYK/8

...that Harry Potter and the Deathly Hallows sold more than 11 million copies in the first twenty-four hours following its release?(Pictured)
...that Guinness World Records is the best-selling copyrighted series of all-time?
... that the c. 8th-century medical text Al-Risalah al-Dhahabiah, attributed to Ali al-Ridha, is also known as the "Golden Treatise"?