discovered that Stark has the same fingerprints as Thad, a clue to the twinship he and Thad share. Thad eventually discovers that he and Stark share a mental bond, and begins to find notes from Stark written in his own handwriting. The notes tell Thad what activity Stark has been engaging in. Observing his son and daughter, Thad notes that twins share a unique bond. They can feel each other's pain and at times appear to read the other's mind. Using this as a key to his own situation, he begins to discover the even deeper meaning behind himself and Stark. Pangborn eventually learns that Thad had an unborn twin brother who was absorbed into Thad in utero and later removed from his brain when he was a child. He had suffered from severe headaches and it was originally thought to be a tumor causing them. The neurosurgeon who removed it found the following inside: part of a nostril, some fingernails, some teeth, and a malformed human eye. This leads to questions about the true nature of Stark, whether he is a malevolent spirit with its own existence, or Thad himself, manifesting an alternate personality. Thad eventually destroys Stark in a showdown where he uses a bird call to bring forth a flock of sparrows that tear Stark's body apart, but the book ends on an unhappy note. It is suggested by Alan Pangborn that Thad's wife may be having serious doubts about the future of their relationship: she is appalled that Thad not only created Stark (if unintentionally), but that a part of him liked Stark. References to Characters in Other Works In the novel Needful Things, Sheriff Alan Pangborn thinks about how Thad would get drunk and call him. He also recalls that Thad's wife took the twins and left him. In Bag of Bones, the main character, author Mike Noonan, recalls how a Maine author named Thad Beaumont killed himself. Adaptations The novel was adapted as a film, The Dark Half, by George A. Romero in 1990, and was released in 1993. It was filmed in part at Washington and Jefferson College and other locations in southwestern Pennsylvania. It starred Timothy Hutton as Thad/Stark, Michael Rooker as Alan Pangborn, and featured Julie Harris as an eccentric colleague of Thad's who provides some vital information about the supernatural. An adventure video game adaptation was released for DOS in