Jordan Lombard There's usually a happy ending though. But characters have to work hard to get it. My favorite of his is One Door Away From Heaven, which is not an easy read, but does have a happy ending.
Suze Most of his books are either sad or scary. The Stranger is kind of weird, but I don't remember it being sad though it's been a long time since I've read it. I just loved this book, even more than most of Mr. Koontz's other books.