'Harry Potter' books are still flying off the shelves with 500 million copies sold Ifeadi C. 00:25 Mashable, Zero Tech Blog Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsHow to create your own custom TikTok audioCities Aren't the Wildlife 'Deserts' Scientists Once FearedHow to Upgrade Your Home Audio for Music or MoviesBiden Has to Play Hardball with Internet PlatformsThe 16 Best Weekend Deals on Headphones, Soundbars, and MoreSpace Jam and the Fury of an Algorithm Scorned