The killer leaves victims with their faces disfigured by a "Glasgow smile".

In César Pérez Gellida's novel Nos crecen los enanos , the plot centers on a sadistic and highly intelligent killer whose primary goal is to evade capture. The story begins with the discovery of two bodies in a pine forest in Valladolid, Spain. Key elements of the story include:

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This development brings back investigators Bittor Balenziaga and Sara Robles , who were previously assigned to the Urueña case.

The novel is noted for its brutal, "razor-sharp" tone and its cinematic structure, with chapters titled using circus-related terms (e.g., "The Tent," "The Acrobat") to reflect the chaotic and dark nature of the narrative.