Both this and its predecessor, "What Cops Know," are excellent collections of first-hand experiences of Chicago police. They're rather dated by now, having been published in the '80s and '90s, but I suspect the basic emotions and descriptions are not that different today. They certainly will not make you want to run out and be a police officer, but they do present a candid view of the job that makes you appreciate the people who are willing to do it, and respect the professionalism of those who do it well.