Não, não é. Também não é baseado em nenhum dos outros romances de Hammesfahr. É uma história original.
No entanto, deve-se notar que O Pecador é uma série antológica híbrida que usa o Detetive Ambrose como personagem do eixo da história. A segunda temporada mostra-o trabalhando em um novo caso, enquanto mergulha mais em sua própria infância. De acordo com este artigo :
It looks like the second season of the USA show will be entirely original. Showrunner and executive producer Derek Simonds did not base the new season on any particular true story, or on any of Hammesfahr's other novels. It's possible that details might be reminiscent of actual cases since true crime is so prevalent that commonalities are hard to avoid, but the goal wasn't to take inspiration from outside sources.
E confirmado por uma entrevista com o produtor executivo Derek Simonds via Variedade
The first season of USA psychological crime thriller “The Sinner” took its story, structure and tone from Petra Hammesfahr’s novel. But the second season is its own, completely original mystery.
Without a pre-existing plot to follow, Derek Simonds created a new story about why someone would commit a seemingly unprovoked murder. This time the culprit is a 13-year-old boy Julian (played by Elisha Henig), and it’s clear from the start that he is guilty. The show follows the first season’s structure of unraveling the complicated reasons behind the crime, a similarity Simonds wanted to echo intentionally.