quality:corruption, linguistic:translation
Supplementary works

Rowling expanded the Harry Potter universe with short books produced for charities. In 2001, she released Fantastic Beasts and Where to Find Them (a purported Hogwarts textbook) and Quidditch Through the Ages (a book Harry reads for fun). Proceeds from the sale of these two books benefited the charity Comic Relief. In 2007, Rowling composed seven handwritten copies of The Tales of Beedle the Bard, a collection of fairy tales that is featured in the final novel, one of which was auctioned to raise money for the Children's High Level Group, a fund for mentally disabled children in poor countries. The book was published internationally on 4 December 2008. Rowling also wrote an 800-word prequel in 2008 as part of a fundraiser organised by the bookseller Waterstones. All three of these books contain extra information about the wizarding world not included in the original novels.

In 2016, she released three new e-books: Hogwarts: An Incomplete and Unreliable Guide, Short Stories from Hogwarts of Power, Politics and Pesky Poltergeists and Short Stories from Hogwarts of Heroism, Hardship and Dangerous Hobbies.

Rowling's website Pottermore was launched in 2012. Pottermore allows users to be sorted, be chosen by their wand and play various minigames. The main purpose of the website was to allow the user to journey through the story with access to content not revealed by JK Rowling previously, with over 18,000 words of additional content. The site was redesigned in 2015 as WizardingWorld and it mainly focuses on the information already available, rather than exploration.