Skagboys just out for the buzz on drugs, to total junkies. It shows how their attitudes and behaviour start to change as they become more defined by the drug and the culture around it". In 2012, Welsh said the prequel was actually initially written as part of "Trainspotting" but was not used in the published version. He later decided he would either erase his old work or use it in some way, as "he had a fear that he might fall under a bus and leave behind 'half-written stuff' which people would publish". He said, "I just went through it and
Prequel Anthony Boucher in "The Magazine of Fantasy & Science Fiction", used to describe James Blish's 1956 story "They Shall Have Stars," which expanded on the story introduced in his earlier 1955 work, "Earthman Come Home". The term came into general usage in the 1970s and 1980s. "" (1979) may have introduced the term "prequel" into the mainstream. The term has since been popularized by the "Star Wars" prequel trilogy (1999-2005). Rather than being a concept distinct from that of a "sequel", a "prequel" still adheres to the general principle of serialization, defined only by its internal chronology and publication order.