How did the author decide to portray the criminal's mindset so convincingly?
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Адский поезд для Красного Ангела (Мировой детектив)

Адский поезд для Красного Ангела (Мировой детектив)
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How did the author decide to portray the criminal's mindset so convincingly?
Did anyone else feel the tension built up too quickly or did it feel just right?
What inspired the setting of the train as a central location for the story?