Is there a YA/ adult mystery book about a group of friends solving a mystery (not murder) with clues and puzzles? It can be any genre….

I'm looking for a book about a mystery and a group of friends solving that mystery. BUT whenever I look for mystery books everybody suggests a murder mystery or detective and that’s really not what I actually mean😭 it can be anything, it can revolve around a mysterious house or inherited house with secret chambers or something or even fantasy. Children have books like Geronimo Stilton, but I have never seen a young adult/ adult book with similar mysteries. Could you guys help me out and suggest me a book?😁💙