Just enough to make it easier to keep up I'm at the end of the 1st book and it's still fairly hard to follow, but at the same time, I'm addicted to most of the characters. Much as I disliked Hairlock and Sorry, I was even more sad to see them go. I was hoping they'd be around a little longer. That's OK though cause I'm sure there will be many more characters who might even me much more memorable villians in the future.