I came across a concise, well-done e-book today out of Australia titled Addict in the Family: How to Cope With the Long Haul. It is targeted to the parents of young heroin users, and approaches the topic from a nonjudgemental, harm-reduction point of view. It is written by Dr. Andrew Byrne, a physician in Sydney who is an authority on methadone maintenance. If you're addicted to opiods, or care about someone who is, I recommend that you take a look.