I picked up this book because I wanted to read a scary one for a change, and this was rated as one of the scariest books written in the last 10 or so years (by the Guardian, I think). And it was pretty spooky and haunting, but it didn't get to me quite as much as a good Stephen King used to when I was younger, though I'm not sure whether that's because of my age or the writing!
But this was well written, and the characters all were interesting. The plotline was nicely intriguing and I really liked the way the plot presented, the story of the degradation of Johnny Truant inside the story of the Navidson Record, which was part of the story of Zampano, which was also all about the Navidson Project film, which we never saw, and so was always out of our reach and impossible to get our heads around, just like the house on Ash Tree Lane itself, which constantly changes shape and swallows and regurgitates its inhabitants.