The plot is rather intriguing - ghost stories always are - as one wonders what ghosts and weird sights they will find next. Yet, there is an element of unbelievability that threw me out of the story as the characters did things that did not make sense.
Point 1: The govenor and his mistress were murdered gruesomely, reportedly by ghosts, that no one can do anything about. Let's go sleep in his bedchamber at midnight and SEE WHAT HAPPENS!
Point 2: A man disappeared mysteriously in a hallway and came back somewhere else, badly injured. Let's go SEARCH THAT HALLWAY AGAIN and see what happens!
Really? What are these people thinking, I wondered. I suspect horror type books are frequently like this, but I can't say for certain, as I don't read many. It turned out they were fighting a bad necromancer. There was one magician in their party. It was an ok book. But really, not worth the time.
Read something more interesting, people. Unless you really want to read a book about ghost stories and people doing dumb things. And it gave in some ways, a fairly accurate description of evil that was creepy. It creeped me out, until I got thrown out of the story by the dumb things the characters did.