IIRC, IMO, Susannah was the creepiest of the book. In the last two books some really bizarre stuff pops up. It is fine to read the following Callahan spoiler for people who've completed the Wolves book. Maybe beneficial for even those who haven't. It explains why he goes into detail about Callahans past. But I agree it was a bit TMI. Spoiler He went into so much about Callahan's past because he was catching the reader up with Callahans role and experience in a previous Stephen King book called Salems Lot. I think it was one of Kings first books. In the series there are many references to the Stand (Crimson King and Walking Dude, a restaurant, Captain Tripps (the killer flu, etc.) and other books.