Dark Tower World, after Roland communicated with that Mage, he began to suspect whether the Black Rainbow he brought to Jimmy was one of the reasons causing the energy imbalance in the Dark Tower World.
However, returning to Earth isn't very easy. The door he previously used to return from New York to the Dark Tower was the one he used when fighting with the man in black, but it is very far from his hometown's location. When he left his hometown to wander around this time, he had no plans to return to Earth, so now he can't confirm exactly where the original door is.
In fact, the entire Dark Tower World had already entered a period of decline years ago. Many places have been abandoned, and there are no GPS coordinates or maps similar to Earth's. Compared to familiar surroundings, it's much harder to precisely locate other places.
