The Dark Tower is a series of eight books which span an entire connected universe which links several other books and stories by Stephen King, including Bag of Bones, The Talisman, Black House, The Stand, Everything's Eventual, From a Buick 8, Hearts in Atlantis, Insomnia, The Eyes of the Dragon, and 'Salem's Lot, with minor references to IT, The Mist, and The Shining.

During the first act of the film, several Stephen King Easter eggs are visible. The twins from The Shining (1980), the hotel from The Shining (but in a photograph), the family (including the dog) from Cujo (1983), and the car from Christine (1983) (as the toy pushed by Jake in his room) are each shown briefly. Toward the end, there is the Rita Hayworth picture from The Shawshank Redemption (1994). Not to mention the 'Pennywise' theme park. The portal that Jake's told to remember as his way back is 1408, title of 1408 (2007).

Roland sees a TV commercial with talking raccoons and asks Jake if 'animals still talk here'. This is a nod to the character Oy in the books; a talking raccoon-like creature called a Billy Bumbler whom Jake befriends.

According to an introduction by Stephen King in one of his books, The Good, the Bad and the Ugly (1966) along with the "Lord of the Rings" book series, is the primary influence for his book series: "The Dark Tower."

After poor test screenings, Sony spent $6m on re-shoots to help flesh out Idris Elba's Gunslinger character.