What is your all-time worst book experience?
For me, it's probably Johanna Lindsey's Keeper of the Heart , which sticks with me even ten years later because all the female characters were fuckwits and all the male characters were jerks, and as a naive fifteen-year-old I was hoping that futuristic romance meant a combination of actual SF (which I've always loved) with romance (which I occasionally really like.) Needless to say, that didn't happen.
So... I want to hear your bad book experiences!