There are many, many things that aren't defined in JK Rowling's world that may be necessary to the trivialities of game play; it is up to the mods to provide a skeleton of the 'game canon', but it is also up to the players to define their world and add to the richness of our universe.
The following lists are meant to help players keep continuity in the realm of game canon. Please feel free to comment if you have additions you would like to make!
Much of this page was contributed to by the players at blurred_mods
.literature
Predefined Harry Potter authors and books (external links, keep an eye on dates)
Cambyses Aether -- Well-known author of a (very old) collection of purist essays. Pureblood (name has died out).
Livia Ashworth: German descended author currently living on her own in the English Moors. Fullblood
A Murder Misremembered (debut novel)
A murder story about a German witch suffering from insomnia who murders her husband. BANNED
Amora Darnell -- Author of many, many cheap and trashy wizarding romance novels. Is actually a wizard named Bob Hedger who is using a female penname to sell books. Halfblood.
Nicholas Farren
Beneath the Water When a young and prominent wizard goes too far in his exploration of the ocean depths, he finds himself kidnapped and caught in the crossfire of a Merpeople war. There are those among them who wish for pleasant relations with the wizards above, and others who fiercely oppose the idea, feeling that only tragedy could come from cooperation with the magical people of the land. The young wizard must learn to adjust to his captive state under water as he devises ways to escape - often aggravating the unfriendly side he was found by - and along the way experiences an adventure like he had never seen before. Action and intrigue colour this novel from beginning to end as worlds collide.
Beyond the Mist
The Farthest Land
Francis James Flannery - one of the 16th century's most celebrated male Seers, specialising in reading tea leaves.
Interpreting the Uninterpreted.
The book has been out of print since the 1812 but there are still at least two copies for sale at Obscurus Books, Diagon Alley.
Matilde Gamp -- Author of a series of books on parenting with purist values. Pureblood
Lisha Gizem -- Author of a popular mystery series starring clever witches. Fullblood.
Samuel Hanson -- Poet who mostly writes about love, the joy of magic, and new discoveries. Muggleborn.
Illuminado Honore - one of the pioneers of studying memories and other aspects of the human subconscious.
The Subconscious Minde: A Study of the Human Braine.
The book has been out of print since the 17th century but three copies survive at Obscurus Books, Diagon Alley.
Pratima Hopkins -- Mystery novelist. Has a tendency to write nearly the same story every single time. Halfblood.
T. J. Kelvin - halfblooded writer and illustrator of a wizarding comicbook series
Mandrake Man.
Mandrake Man was part of a herbological experiment gone terribly wrong. An unidentified potion (Otherwise known as Potion X) got spilled into his pot, and when he was depotted as a sproutling, he never screamed. The Herbologist, Professor Pervonian, thought that this was a sign. As years of working with dangerous plants and potions had left her barren, she raised Mandrake Man as her own son. Suddenly! on Mandrake Man (his real name is Gershwin)'s 17th birthday, his "mother" was kidnapped, taken from him and forced to breed a new line of evil plants by a nameless Supervillain, most often referred to as "Him" or "My Arch Nemesis." Mandrake Man began to train. He has the power of Supersonic Scream, which, while not fatal (unless he wants it to be, which he usually doesn't as he is A Good Guy), renders his enemies helpless -- and sometimes unconscious -- unless, of course, they are wearing earmuffs (his kryptonite -- please excuse the blatantly muggle reference). He also has a healing ability, because that is what mandrakes do, and it has come in handy many-a-time. The series has been on-going since 1942. Mandrake Man has died and been "re-sprouted" three times since the comic began, and in the late 60s he "pollinated" with Fanged Geranium Gal. There was such a fan revolt that both F.G.G. and their sproutling were very quickly killed off by fan favourite villain, Dr. Gillyweed.
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Marcus Middleton -- Essayist for the Muggleborn cause. Attempts to combat Cambyses Aether’s essays. Halfblood.