What song do you think represents the series (either one, i really dont care)

This might be better for Percy only, but maybe Invincible by Hedley? Or When We Stand Together by Nickelback? Some of the lyrics make sense, but others do not.

Another one I found that I liked at LEAST for the first book is Know Your Enemy by Green Day... a lot of the lyrics actually make sense with the stories, although a lot of them do not make sense. I thought it was good for the first book because Percy thought Luke was a friend, when he turned out being an enemy. :S

There is also Your Betrayal by Bullet For My Valentine, but I think that is more focused on Luke and Annabeth, :S

Overall, I like Know Your Enemy the best. :)