Writers Henning Mankell and Jan Guillou gave the protagonist the name Wallton as a reference to their best known literary characters, Kurt Wallander and Carl Hamilton respectively.
Written by Jan Guillou and Henning Mankell, Mankell's most well-known character Kurt Wallander and three of his colleagues appear as side characters.
Writers Jan Guillou and Henning Mankell both appear as fictional versions of themselves, as does Guillou's wife Ann-Marie Skarp.