Bright graphics and color photos illustrate this really rather comprehensive look at assorted tools used in fighting crime.  It’s up-to-date at this time with a lot of modern technology, giving a brief explanation as to how each device operates.  It raises questions as to the privacy issues some worry about, and the limitations of some technologies.  It includes a timeline in the back that looks at the history of crime-fighting (dating back to the first known police force in ancient Egypt).  I think it will be of high interest to kids who watch crime dramas on TV and are curious about how all these gadgets work, though it may go more toward sparking curiosity that fully satisfying it.  My one caution is that it is likely to be an out-dated book rather quickly, as technology changes so rapidly.