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Sinistra Lowe was a witch and an advocate of the supremacy of pure-blood wizards, having authored at least one book on the subject, The Muggle Conspiracy. Dolores Umbridge had a copy of this work in her desk at the Ministry of Magic, while on the post of Senior Undersecretary to the Minister for Magic.
- Harry Potter and the Deathly Hallows: Part 1 (Mentioned only)