If you liked Vicious, then you'll love this sequel. I'll be surprised if this doesn't get an adaptation at some point. I wouldn't consider this a perfect book, but I thoroughly enjoyed the ride. 

Vengeful was simply entertaining. This gritty world, full of grey characters, easily kept my attention. I couldn't put it down once I was a third of the way through. I'm not sure what it says about me, that I love a book full of villains seeking vengeance. I think revenge is such a great motivation to give a character. I find it immensely satisfying, and this story does it in a multitude of ways. 

My favorite thing about this series is that each book has a good ending. It's left open just enough that I crave a continuation, but I could also be satisfied with the ending provided. 

I would highly recommend this to readers who love comics and superheros. I would also recommend this to any reader in general. Entertainment is universal.