One of the quiet joys of reading Stephen King's works is realizing that almost all of them occupy a shared reality. Some of it comes with his characters — supporting figures in particular — who jump from novel to novel, but it also entails places, situations, and similar Easter eggs referencing earlier works. TV and movie adaptations of his books make note of it from time to time — particularly the Castle Rock TV series, which was predicated on the interconnectivity of it all — but most are concerned with telling their own stories rather than acknowledging others. King's writing, on the other hand, is very different, with numerous cross-references directing readers to other works. Unless the apocalypse is involved, most of his works seem to take place in the same universe.
Source：https://www.cbr.com/pennywise-appearances-stephen-king-stories/
