Three new ‘Harry Potter’ stories will be released next month.

A number of online book stores posted entries for three e-books by J.K. Rowling which will go on sale in September, ‘Short Stories from Hogwarts of Power, Politics and Pesky Poltergeists’, ‘Short Stories from Hogwarts of Heroism, Hardship and Dangerous Hobbies’, and ‘Hogwarts: An Incomplete and Unreliable Guide’, and it has now been confirmed the stories will “supplement” the author’s original seven-book series.

A statement read: “The Pottermore Presents series will launch in September and is intended to supplement the Harry Potter book series with short-form content that is entertaining, creatively curated by the Pottermore staff and accessed easily on mobile platforms.”

In 2011, a Harry Potter website, Pottermore, which offers news, features and articles, as well as previously-unpublished writing from Rowling, was launched and one of the reasons the books are going on sale is to “reach” fans who don’t currently use the online portal.

The statement continued: “We also recognise that not all Harry Potter fans who want to read more about the wizarding world visit pottermore.com so we’ve developed Pottermore Presents to reach those fans through other channels. The titles will be available on the Pottermore shop and via leading online retail outlets.”

‘Short Stories from Hogwarts of Power, Politics and Pesky Poltergeists’ will reportedly reveal the truth about Professor Dolores Umbridge, and how Horace Slughorn met Lord Voldemort.

Beloved teacher Minerva McGonagall and werewolf Remus Lupin will feature in ‘Heroism, Hardship and Dangerous Hobbies’, while will focus on Minerva McGonagall and Remus Lupin, while ‘Hogwarts: An Incomplete and Unreliable Guide’ will take fans behind-the-scenes at the famous school of magic.