Junk, known as Smack in the US, is a realistic novel for young adults, written by British author Melvin Burgess and published in 1996 by Andersen in the UK. Set on the streets of Bristol, England, it features two runaway teenagers who join a group of squatters, where they fall into heroin addiction and embrace anarchism. Both critically and commercially, it is the best received of Burgess' novels. Yet it was unusually controversial at first, criticised negatively for its 'how-to' aspect, or its dark realism, or its moral relativism.