Question: when was harry potter and the deathly hallows book released
Answer: The book was released on 21 July 2007 , ten years after publication of Harry Potter and the Philosopher 's Stone ( 1997 ) , by Bloomsbury Publishing in the United Kingdom , in the United States by Scholastic , and in Canada by Raincoast Books , ending the series that began in 1997 with the publication of Harry Potter and the Philosopher 's Stone .