I found this to be both sad and funny at different times in the book. The story of these character's grappling with addiction and the adverse effects therein provides what I found to be a lot of interesting commentary on drugs and their standing in our (American) culture.

The interplay between the different larger groups (enforcement, rehab, dealers, users) was interesting to me. In addition, his portrayal of this surveillance filled world struck me as kind of apt these days, as well.