Question: Skagboys is a 2012 novel by Scottish writer Irvine Welsh, it is a prequel to his 2002 sequel, which novel published in 2002 by Scottish writer Irvine Welsh, and is the sequel to "Trainspotting"?
Sentence (from "Skagboys"): It follows the earlier lives of characters Renton and Sick Boy as they first descend into heroin addiction.
Relevant evidence: No