Here's the idea: take about five minutes and read a mystery. The stories -- some about the crime, some about the evidence left behind, or perhaps the getaway or the investigating detective, and so on -- are told with all the clues you need to solve the question posed at the end. The problems are yours to solve: How did the courtly investigator expose the insurance cheat? What clues at the scene of a murder-suicide actually point to a murder-murder? What egregious mistakes were being made by airport security? Plus 37 more brain-teasing situations.