The overarching story begins with ( Der Fall Bramard ), where the killer Autunnale, who has sent Bramard cryptic letters for two decades, finally makes a mistake by leaving a strand of hair in his thirteenth missive. This slip-up reawakens Bramard and pulls Arcadipane back into a desperate investigation to finally close the case that destroyed Bramard's life.

Provide a of a specific book in the series.

: Bramard’s former protégé who inherited his mentor's position. Unlike the stoic, concise Bramard, Arcadipane is more physically and emotionally grounded—a "Sancho Panza" figure struggling with a failed marriage and the messy realities of raising two teenagers.