I didn't know it existed either, and I usually keep up with such things, especially as I'm a big fan of the Odd Thomas books. Yes, some of the books are better than others, but they're all very enjoyable, and the fact that there's a movie is fascinating. Stephen King has had almost all of his books and stories turned into movies at one point or another, and some of those are made by major studios, while others are made for TV. As for Koontz? His track record isn't as solid, which is strange, because he's produced some really great books. Anyway, just the other day I caught wind that there was an Odd Thomas movie, and that the movie itself was apparently already made, but that it might never see the light of day. Shame, too, because I managed to track down the trailer, and the movie looks top notch. Check it out.
httpv://www.youtube.com/watch?v=5ybBq5AETyU