The essays were published on Pottermore, a website built around the world of Harry Potter, to release new writing about her love-to-hate character Dolores Umbridge, a key villain in the fifth book, and those with a membership to the site are able to sign in and read them now. The writing features backstory about Umbridge that was never revealed in the books, including her twisted rise to power within the wizarding government system, as well as Rowling’s personal thoughts about the character.
Rowling says that many years ago, she came into contact with “a teacher or instructor whom I disliked intensely on sight. The woman in question returned my antipathy with interest.”
In another section which was labelled ‘The Carriages’, is based around the mystery of the skeletal horse-like creatures and where they originate from. Thestrals can only be seen by those who have truly been touched by death and in her writing, Rowling has provided the answer to the question of why Harry could only see them in his fifth year at Hogwarts.
Other areas include an information section on every minister for magic, a history of the famous Azkaban prison, professor Sybil Trelawney, and an introduction to the ancient wizarding practice of name seers.