Scorpio Races by Maggie Stiefvater
It happens at the start of every November: the Scorpio Races. Riders attempt to keep hold of their water horses long enough to make it to the finish line. Some riders live. Others die.
At age nineteen, Sean Kendrick is the returning champion. He is a young man of few words, and if he has any fears, he keeps them buried deep, where no one else can see them.
Puck Connolly is different. She never meant to ride in the Scorpio Races. But fate hasn’t given her much of a chance. So she enters the competition — the first girl ever to do so. She is in no way prepared for what is going to happen.
From me: Yes...water horses called the Capel Ishka. When I first heard about the story someone said "sea horses" that eat flesh and I kinda chuckled. Really? Sea Horses?
Nah, not the kind you see in the aquarium, but the kind of ancient Irish legend, which I hadn't heard of until now. Here is more: http://en.wikipedia.org/wiki/Kelpie
The writing is just SO DAMN GOOD. Seriously. I listened to it on audio and when I wasn't listening I was reading. There were sentences that I would stop and reread. One line mentioned a woman's green rubber boots "unimpressed with our mud."
If you get a chance....pick it up. It is labeled a teen book, but don't be put off. Check it out.
If you get a chance to listen to it, please note that the music used was written and performed by the author. Kinda cool.
Ah...I was looking for the music included and found it here on this book trailer (commercial for the book)