Junk, known as Smack in the U.S., is a realistic novel for young adults by the British author Melvin Burgess, published in 1996 by Andersen in the U.K. Set on the streets of Bristol, England, it features two runaway teens 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, criticized negatively for its "how-to" aspect, or its dark realism, or its moral relativism.