This isn't a sequel. IT: Chapter Two is not a sequel, it is a conclusion. IT (1990) was three hours long and crammed in the whole 1,100 page novel. This 5 hour movie series (IT: Supercut) is telling the 1,100 page novel. As a reader of the book, it was an accurate description, with the Ritual of Chüd, and all that. It was enjoyable to watch, as well.