It’s set in a small town where the main girl is a young teen/pre-teen and she lives with her grandparents and her uncle who is younger than her and is basically her little brother. They go to the library in town (the mystery of the book is centered around the library) and the library has a large mural of Andrew Carnegie burning in hell because the town hated him and refused one of his Libraries and built their own with a big “f you” to him in it.