Death at the Sanatorium

The isolated sanatorium adds a haunting atmosphere to the story. I'm curious whether the author drew from real locations or crafted it purely from imagination.

The slow unraveling kept me hooked, but I'd love to hear if others thought the suspense was sustained throughout or if it dragged at any point.

The characters' secrets and motives felt so layered — what do you think led to the decision to reveal things gradually instead of all at once?