In the chronology of the Dark Tower series, we meet him in Wolves of the Calla. After working with the Ka-Tet to defeat the titular antagonists he becomes a part of the group, going on to help in ...

The story follows Roland Deschain and his allies, or Ka-tet, on his quest to The Dark Tower. There have been previous attempts to adapt the story, including a 2017 movie that flopped at the box ...

The ka-tet, in the Dark Tower realm, is a close-knit group who go on missions/adventures together. The group forms a bond, almost familial, and Roland takes the concept of ka-tet very, very seriously.