: Much of the research took place at a rare books library connected to mysticism and alchemy.

: Aamina shared a deep interest in religious erotica with a Catholic nun.

In of Les Enquêtes du commissaire Van der Valk (titled " Only in Amsterdam "), Piet Van der Valk and his team delve into a world of mysticism and religious erotica. Plot Summary

: The investigation is further complicated by the Jabara family's internal struggles and Aamina's twin sister, Zafira.