Many crime shows and movies deal with the topic of a mysterious disappearance, but fictional stories often sensationalize the topic in order to catch the viewer's interest. In reality, finding a missing person can be hard work for detectives, as there are sometimes few clues left behind. Readers discover how police use math and science to solve this puzzle. Full-color photographs, informative sidebars, and by-the-numbers fact boxes augment the compelling text, giving readers a more accurate understanding of the process of searching for missing persons than they will find on television or at the movies.