Got it.
Found it, too. It's at the end of the unrevised edition, just like you said.
Anywho, it seems you're partially right, Welsh. The idea of the Dark Tower came to him in college, but he actually wrote the book along the same time that he was writing others. He wrote a chapter at a time, every so often. When he wasn't getting anywhere with Salem's Lot he wrote the chapter where Jake "dies", and it wasn't until he wrote The Stand that he thought about adding Randall Flagg in the mix.
So the Dark Tower was in fact shaped around the other books...the other books weren't shaped around the Dark Tower.
Found it, too. It's at the end of the unrevised edition, just like you said.
Anywho, it seems you're partially right, Welsh. The idea of the Dark Tower came to him in college, but he actually wrote the book along the same time that he was writing others. He wrote a chapter at a time, every so often. When he wasn't getting anywhere with Salem's Lot he wrote the chapter where Jake "dies", and it wasn't until he wrote The Stand that he thought about adding Randall Flagg in the mix.
So the Dark Tower was in fact shaped around the other books...the other books weren't shaped around the Dark Tower.