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The Dark Forces: A Guide to Self-Protection is a guide book in Harry Potter and the Philosopher's Stone. It was written by Quentin Trimble. It has information on the Dark forces, including Dark creatures.

It is a set book every first-year[1] and fourth-year[2] student at Hogwarts School of Witchcraft and Wizardry has to bring for Defence Against the Dark Arts. Harry Potter purchased the book before his first year.[1] In his fourth year, Barty Crouch Jnr., pretending to be Professor Alastor Moody, asked Defence Against the Dark Arts students to put the book away for their lesson.[2]

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