"Junk" is a novel written by Melvin Burgess that tells the story of a group of teenagers who get involved in the world of drugs and addiction. The main characters, Gemma and Tar, are drawn into this dangerous lifestyle as they experiment with heroin and other substances. As they spiral deeper into addiction, they face the harsh realities of their choices and struggle to break free from the hold that drugs have on them. The novel explores themes of friendship, love, and the destructive power of addiction, painting a raw and honest portrait of the consequences of drug abuse.