La Fille dans les serres de l'aigle

The locations felt so vivid and atmospheric—I'm curious if they were based on real places or crafted entirely from imagination. How did the author decide on these specific settings?

The internal conflict added a lot of depth, but I wondered if it was exaggerated or if that’s how real detectives might feel in such situations.

Shifting viewpoints kept me guessing, but I'm curious whether this was planned from the beginning or developed during the writing process.