The inspiration of this novel is the six months Hack spent at a Romanian Catholic boarding school when he was 12. The title character is based on an actual nun at the school named Sister Brândusa, who took her students over her knee and brutalized them at the slightest provocation. The real-life Sister Brândusa weighed over 250 lbs. and had a hairy mole covering half her face, so Hack based the fictional version on his super-hot friend Rosanna De Candia. The story is vastly more effective for it.