well, even more - i was once surprised by the existence of textbooks with solutions! and then suprised again when learning that solutions doesn't help that much. finding a wrong/mistyped solution then becomes name of the game.

thou if solution includes ways, then surely - it would be spoling fun. hm, haven't read much mysteries later - and again it depends: this lovely book was a wonderful mystery (check it out btw), and i knew the ending kinda beforehand. still suprusingly unpredictable. mystery style vs. mystery narrative? does author know the answer already or just facsinated with a magic of a new unknown world?

ps. while searching for a book link, found this title: The Strange Case of the Broad Street Pump: John Snow and the Mystery of Cholera =)