Immortalized by the hit HBO series "The Wire," Baltimore's Eastern District is one tough neighborhood in one of the country's toughest towns. With some 45,000 residents, almost entirely black, it generates 20,000 arrests a year, the vast majority of them drug-related. It's a tough, gritty neighborhood with widespread poverty, open-air drug markets, a healthy heroin (or "hair-on" in Eastern District-speak) habit, and all the attendant problems associated with those ills.

For Moskos, and for his readers, his sojourn on the mean streets has paid off handsomely. Moskos got a book deal (and presumably a dissertation) out of his experiences, and we readers get a real treat. The uniformed Moskos -- he served exclusively as a beat officer -- was able to win the trust and fellowship of his colleagues, and in so doing, he was able to open a window on what it is like to be a police officer in the drug war.

I would imagine that most Drug War Chronicle readers -- LEAP members excluded -- have little knowledge of or empathy for the men in blue. The cops, after all, are the front line in the drug war. And, as Moskos reports, drawing on extensive notes, the drug dealers and users of the Eastern District are relatively easy pickings for police officers looking to generate arrest statistics.

"In high drug areas, there is no shortage of drug offenders to arrest," he writes. "The decision to arrest or not arrest becomes more a matter of personal choice and police officer discretion than of any formalized police response toward crime or public safety."

Not only do police routinely arrest suspect Eastern District residents -- for loitering, if nothing else -- they almost universal despise them and their drug habits. Moskos really shines at getting his comrades to speak openly and honestly about their attitudes, and in that sense, "Cop in the Hood" is as revelatory as it is sometimes disturbing. Such attitudes may be deplorable, but they are also understandable. When all you see is the worst of humanity, it's easy to get alienated. As one officer put it, "You don't get 911 calls to tell you how well things are going."

But not all beat officers are eager to arrest drug offenders. As Moskos details, the cops get frustrated by the revolving-door that sees drug offenders sent to county jail on arrest only to be spit out a few hours later or to have drug dealing charges reduced to simple possession because prisons are packed and prosecutors overworked. (Moskos observes that the drug war would grind to a halt if drug offenders uniformly demanded jury trials. Now, there's a reason to unionize drug users!)

Police officers don't want to be social workers, Moskos reports, and they are not interested in the root causes of drug use and attendant social ills. What they are interested in is doing their job with a minimum of hassle (from the streets or their superiors), returning home safely each night, and retiring with a nice pension. That means that for many officers, high drug arrest numbers early in their careers will drop off over time as they confront a combination of a sense of futility, overtime, and paperwork. As one officer put it:

You'll get out there thinking you can make a difference. Then you get frustrated: a dealer caught with less than 25 pieces will be considered personal use... Or you go to court and they take his word over yours. You're a cop and you're saying you saw something!... After it happens to you, you don't care. It's your job to bring him there [to court]. What happens after that is their problem. You can't take this job personal. Drugs were here before you were, and they'll be here long after you're gone. Don't think you can change that. I don't want you leaving here thinking everybody living in this neighborhood is bad, does drugs. Many cops start beating people, thinking they deserve it.

While Moskos by no means sugarcoats the behavior or attitudes of his coworkers, his reporting will undoubtedly help readers attain some understanding of how they got that way. "Cops in the Hood" is also useful for understanding the bureaucratic grinder facing police officers in large urban departments, where they are caught between pressures from above for more arrests, from Internal Affairs to do it by the book, from the neighborhoods to clean out the riff-raff and from the same neighborhoods to respect the civil rights of residents.

Moskos brings the added advantage of not writing like an academic. "Cops in the Hood" is engaging, even riveting, and makes its points straightforwardly. Yes, Moskos references policing theory, but he does so in ways that make it provocative instead of off-putting.

He also includes a well-researched and -written chapter on the evils of prohibition -- it's subtitled "Al Capone's Revenge" -- but in this case, it's hardly necessary. Like a good student listening to his English composition instructor, Moskos has shown us and he really doesn't need to tell us. Still, it is a strong chapter.

Moskos writes about his experience as a beat officer. That's a different animal from the largely self-selected group of police cowboys who end up in drug squads and SWAT teams. I have less sympathy for them, but that's another book, not this one.

People interested in the nitty-gritty of street-level drug law enforcement need to read this book. Criminal justice students and anyone thinking about becoming a police officer need to read this book, too. And the politicians who pass the laws police have to enforce (or not), need to read this book as well, although they probably won't.