This book is a great start to a great series of books. I would definately recommend this to friends, and if i were you when you buy this one, buy the next one aswell so you dont have to wait to keep reading!
The main character elena is a very sassy, confident woman, which is quite refreshing, as most females in these type of books tend to be always on the lookout for a big, strong male to come rescue them, but this lady can hold her own, and then some !
Also, if you enjoyed this you should try 'The Black Dagger Brotherhood' series by J.R.Ward (fantasticly sexy vampire warriors, fighting evil in new york),
& 'Nightkeepers' and 'Dawnkeepers' by Jessica Andersen, mayan based series about magical warriors trying to stop the world from ending in 2012. They are both must reads in my opinion!