Luckily for “It” fans, the new film is pretty faithful to the source material, due in part to the filmmakers’ decision to split the story into two parts. Even 1990’s “It” TV mini-series, which clocks in at three hours and twelve minutes, doesn’t encompass everything King crammed into his exceptionally detailed book. Spoilers aplenty from here on out, so readers beware! But, as with so many film adaptations of classic novels, not everything in the book makes the final cut. With King’s mammoth novel sitting around 1,138 pages, the bloody details of Derry’s darkest days are fleshed out across multiple time periods. Derry had popped up in several King novels before “It,” including “Pet Cemetery” and the novella “The Body,” which served as the source material for the film “Stand By Me,” but it wasn’t until “It” that King fans really got to know the dark history and evil lurking in the sewers of the fictional Maine town. In 1986, King published “ It,” which introduced the world to seven scrappy kids nicknamed The Losers Club, who faced off against a child-killing, shape-shifting clown named Pennywise, an evil entity that was infesting their hometown of Derry, Maine.

Clowns were always creepy, but then Stephen King came along.

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