This recurring number is a pivotal mystery starting in the later books, reflecting King’s own life and the structure of the multiverse.
The Ka-tet is fully formed and heads toward the city of Lud. This volume leans heavily into sci-fi and dystopian horror, featuring a decaying urban wasteland and a riddle-obsessed, sentient monorail named . 4. Wizard and Glass The Dark Tower Books I-V
Picking up the pace toward the Tower, the group arrives in the town of Calla Bryn Sturgis. The residents ask the gunslingers for help against "Wolves" who steal their children once a generation. This book also introduces Father Callahan from 'Salem's Lot , bridging the gap between King's other famous works. This recurring number is a pivotal mystery starting