Le Berger de l'avent

The combination feels fresh and intense, but I wonder what motivated the author to merge these genres in this way. Did the world-building evolve from a specific idea or concept?

I was hooked at the start, but some parts felt a bit heavy with world details. Was that intentional to build atmosphere, or just how the story unfolded?

The magic felt so integral yet mysterious; I’m curious whether the rules were planned from the beginning or developed organically during writing.