Paizo and Pathfinder have been trying very hard for a long time to create new D&D adventure and stories with a classic feel, and they certainly succeeded with "The Skinsaw Murders". It introduces a whole new way to handle ghostly hauntings in D&D/3.75, builds a haunted house adventure around it, and then cuts loose. It has ghouls, undead killers, mind-ravaging ghosts, and more. Richard Pett packs a /lot/ of chills and thrills into this one, and it's easily worth the time to get.
The backup articles are also very well done, ranging from the first article detailing a deity and her church, one covering one of the setting's major cities, fine fiction by Jason Bulmahn, and the usual Bestiary.
All in all a great buy!