Speaking of walking out, I've been trying to read the books ahead of the scripts concerning certain adaptations. So I'm halfway through Ender's Game (book), and I'm surprised to say I don't think I can finish.
It's one of the most overrated science fiction novels of all time, in my opinion. Not a terrible book, but not nearly as great as it's often spoken to be.
I thought Child 44 was great read. And very well suited to an adaptation. But then, I believe the writer was an exec in the biz and probably had that in mind. Still, I had a hard time putting it down.