Pottermore Presents Series by J. K. Rowling

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  Short Stories from Hogwarts of Heroism, Hardship and Dangerous Hobbies Pottermore Presents #1
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  Short Stories from Hogwarts of Power, Politics and Pesky Poltergeists Pottermore Presents #2
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  Hogwarts: An Incomplete and Unreliable Guide Pottermore Presents #3