JK Rowling
British author JK Rowling, creator of the Harry Potter series of books, poses during the launch of new online website Pottermore in London June 23, 2011. Reuters/Suzanne Plunkett

On Tuesday, Pottermore released a new set of ebooks with new entries and information about the “Harry Potter” world. The collection is composed of three books that are collectively known as “Pottermore Presents.”

The trio of ebooks are individually titled as “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.”

According to Pottermore, each story explores a different theme related to Hogwarts and includes intricate details about famous characters.

“Hogwarts: An Incomplete and Unreliable Guide dives into the nooks and crannies of the beloved wizarding school itself, unfurling everything from details about the Hogwarts ghosts, to what happens when the Sorting Hat can’t decide on a student’s house.

“Short Stories from Hogwarts of Power, Politics and Pesky Poltergeists explores the darker roots of the wizarding world. You’ll learn more about the troubles that faced the Ministry of Magic, the horrors of Azkaban prison and enjoy an entirely new original piece of writing by J.K. Rowling on Horace Slughorn.

“Finally, in Short Stories from Hogwarts of Heroism, Hardship and Dangerous Hobbies , Pottermore celebrates the colourful staff of Hogwarts. There’s more to discover about Care of Magical Creatures teacher Silvanus Kettleburn, as well as another new piece of writing from J.K. Rowling on Minerva McGonagall, and her involvement in the second wizarding war.”

Two of the books contain chapters written by J.K. Rowling, which include the chapters on Professor Minerva McGonagall (in “Short Stories from Hogwarts of Heroism, Hardship and Dangerous Hobbies”) and Professor Horace Slughorn (in “Short Stories from Hogwarts of Power, Politics and Pesky Poltergeists”), while the other parts were written by her Pottermore team.

“We read through everything in our archives, took pieces written by Rowling and the Pottermore editorial team, and sewed it all together,” Pottermore’s Anna Rafferty explained.

All three ebooks are now available from various online retailers, including Pottermore, Amazon and Barnes and Noble, for US$2.99 (AU$3.89) each.