Hmmm, do you mean which characters from other books are interwoven into 11/22/63? That'll take a bigger brain than mine. I do recall IT being referenced. I do think there are others though. I remember noticing them as I read. What we need is someone who is reading it right now. Maybe they'll make us a list.
do you want what we call "Easter Egg"? Things seen within the book that refer to other SK books?
- "It" does play a big part with Bev and Richie making a nice cameo. Jake kept touching the Plymouth Fury for luck - if I'm not mistaken, "Christine" was a Plymouth Fury. The other one I caught was Shawshank Prison - a likely reference to "Rita Hayworth and the Shawshank Redemption
There is one for the John D. MacDonald fans. JDM wrote the Travis McGee series as well many "pulp fiction" books in the40s and 50s. He mentions the author's name several times as well as one of his books. Within the context of the story he mentions twice "the girl, the gold watch and everything". That is the title of one of MacDonald's books, one where the owner of a watch is able to stop time.