. . . . . "by Wilber Slinkhard"@en . . . . . . "*Hogwarts students\n*Flourish and Blotts"@en . "1995"^^ . . . . . . "Defensive Magical Theory"@en . . "R5"@en . . . "Defensive Magical Theory"@en . "Theory of defensive magic"@en . "Book"@en . . . . . . . . . "Yes. Flourish and Blotts"@en .