Here's the idea: take about five minutes and read a mystery. The stories - some about the crime, some about 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 problem is yours to solve: How did the attorney know that the skeleton was dumped into the trench the night before? How did the investigator know which dead man was really the driver of the bullet-riddled car? What tipped off the investigator as he inspected the scene of the murder?