I must admit that I admire mystery writers. Plotting a mystery takes into consideration so many details. I can just imagine the writer jotting down all the events and how they lead to a satisfactory conclusion. It must be like a map where an X is placed to indicate a clue and all those clues lead to a treasure. The reader must be careful because sometimes the clues are false and are placed there to mislead. But that's part of the fun, isn't it? When we as the reader are able to guess the mystery, there's a sense of pride. Pride at having solved a kind of puzzle. Mysteries and puzzles challenge the mind and are meant to solved, that's why they exist.