The Dark Tower has remained unreleased.
 Roland's quest is to find the Dark Tower, a fabled building said to be the nexus of all universes
A prequel, The Dark Tower: The Gunslinger Born is plotted by Robin Furth, scripted by Peter David, and illustrated by Jae Lee and Richard Isanove, and is set around the time of the flashbacks in The Gunslinger and Wizard and Glass

