If it's half as good as Homicide: Life on the Streets, I'm sold. I had the book on which Homicide was based - fantastic read. In fact it was the first book I ever bought from amazon.com - first international purchase using the interwebs. Brilliant.
Ooh, I notice he's got a new book out: The Corner: A year in the life of an inner-city neighbourhood
*adds to Amazon wishlist*