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Despite the final Harry Potter book publishing in 2007, author J.K. Rowling continues to add to the series’ narrative, resulting in a phenomenon known as “retroactive continuity.” Read more: https://wapo.st/2HElv6V. Subscribe to The Washington Post on YouTube: https://wapo.st/2QOdcqK Follow us: Twitter: https://twitter.com/washingtonpost Instagram: https://www.instagram.com/washingtonpost/ Facebook: https://www.facebook.com/washingtonpost/