'Black House'

The 'Black House' published in 2001 is the second novel written by Stephen King and Peter Straub.  It is the sequel to "The Talisman" from 1984

Twenty years ago, Jack Sawyer went to the Territories to save his mother and her Twinner from death. He is now a former Los Angeles homicide officer and leads a quiet life in a small town in Wisconsin. His peace doesn't last long; a series of cruel murders begins to plague the area.   The local chief of police, a friend of Jack's, asks him for help in solving the case. Nothing is known about the murderer-cannibal. They call him the Fisherman and it is very likely that he is imitating another serial killer from New York. Cruel letters sent to the victims' families only confirm this assumption.  Jack, along with the Hells Angels, starts to fight the stranger, whose power surpasses all expectations. The result of this test of strength will remain uncertain until the last moment...