Continuity mistake: In Ch. 72, Stu describes finding Harold dead, and recalls that "Harold still clutched the Permacover notebook in one stiffening hand." But earlier, in Ch. 64, Stephen King states that Harold "put the Permacover notebook into the Triumph's saddlebag" immediately before shooting himself.
Continuity mistake: In chapter 47 Stu, Harold, Glen and Frannie rescue a group of women from the 4 rapists. Originally he says the 9 of them walked to a farmhouse to spend the night. The following day it's stated the 4 women joined their party when it should say 5.
Continuity mistake: Chapter 8, it says on June 18, 5 hours after talking to his cousin Hap, Joe Bob blah blah blah... But on June 18th, Hap is already in Atlanta, as they were picked up on the 17th per the previous chapter. Then he does in to say that Harry Trent stopped in a dinner in East Texas and when he came out gave directions to a new Yorker going back home (I'd think they vacationed in California) but then he says the kids loved Disney world in Orlando.