It's The Scorpio Races, by Maggie Stiefvater.
I have to admit that I totally judge books by their covers. If a book has an awful cover and I've never even heard about it, then I won't even look twice at it.
The Scorpio Race's cover really turned off the 'I WANT TO TOUCH IT' button for me. I know that several hours were spent on this cover, but it still... err. Shiver (oh gosh, I didn't mean to do that).
But I'd heard really good things about this book--and, it's Maggie Stiefvater. She wrote the Shiver series (and now do you see where I messed up in the last paragraph?).
So I read it, and I was instantly hooked. I flew through the pages like lightning. Or, as fast as the Capaill Aisce, the water horses in the book.
I seem to be saying this a lot about books lately, but this book has a really crummy ending. It was sad, and it nearly broke my heart. I cried.
I also screamed at the book during the middle.
"NO! NO! Maggie, why? Why? WHY?"
I seriously hated the author when I was screaming at her book. She made things so... hard. She mixed up my feelings for the book. What I felt about the characters, who I was supporting more than the other.
What I've got to say, now that the book is over?
The cover suits it.
Even though it still stinks.
Keep writing, Maggie Stiefvater.