Harry Potter and the Deathly Hallows.

Released on July 21, 2007, the seventh and final novel in Rowling's acclaimed Harry Potter Series, Harry Potter and the Deathly Hallows, shattered sales records, surpassing every record set by previous titles in the series. The book holds the Guinness World Record for most novels sold within 24 hours of release, with 8.3 million sold in the US and 2.65 million in the UK. Generally well received by critics, it won the 2008 Colorado Blue Spruce Book Award, and the American Library Association named it a "Best Book for Young Adults." “We can't think of anyone else who has sustained such an intricate, endlessly inventive plot over seven thick volumes and so constantly surprised us with twists, well-laid traps and Purloined Letter-style tricks. Hallows continues the tradition, both with sly feats of legerdemain and with several altogether new, unexpected elements” (Publishers Weekly). The film adaptation directed by David Yates and distributed by Warner Bros. Pictures was released in two parts: Harry Potter and the Deathly Hallows – Part 1 in November 2010 and Part 2 in July 2011.