Drug Abuse Treatment
This 1989 University of North Carolina Press volume by Robert Hubbard and colleagues is about as far from beach reading as you can get — it's a dense federal research report drawing on two major national studies to evaluate how well different drug treatment programs actually work. The empirical case it builds for government-funded treatment was genuinely influential in policy circles, and the longitudinal data was rigorous for its era. The honest caveat is that the data is now several decades old, and the writing assumes a specialist audience comfortable with research methodology. If you're a public health researcher or policy historian tracing the roots of American addiction treatment, it belongs on your shelf. Everyone else will find it hard going.