21 July 2007: The final Harry Potter book hits the shelves

Harry Potter and the Deathly Hallows, the final instalment in the Harry Potter series, was released on this day in 2007, becoming Britain's fastest-selling book.

.K. Rowling holds a copy of "Harry Potter and the Deathly Hallows" SHAUN CURRY/AFP via Getty Images
(Image credit: © Getty Images)

For ten years, Harry Potter fans had been spellbound by the adventures of the boy wizard, whose mission it was to defeat the dastardly Voldemort with the help of school chums Ron Weasley and Hermione Granger. But 21 July 2007 marked a bitter-sweet day in their diaries. For it was on that day that Harry Potter and the Deathly Hallows, the seventh and final novel in the series, hit the shelves.

To say the brand has been successful would be a massive understatement. When you factor in the seven novels, eight films, 11 video games, a handful of tourist attractions and more than 400 items of official tat, Statista reckons Harry Potter had generated revenue in excess of $25bn by 2018, with $8.5bn in box office receipts, €7.7bn from books, €7.3bn from toys and €2bn from DVDs. JK Rowling herself has raked in over $1bn – the first author to have done so.

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That's not bad for an idea that came to Rowling in an idle moment while stuck on a delayed train to Manchester in 1990.

Chris Carter
Wealth Editor, MoneyWeek