This book has an incredibly creative story line with lots of little twists. It's so fantastical with all its talk about ley lines and the ancient Welsh King Glendower and psychic powers, but at the same time the characters are so real. You can't help but fall in love with the raven boys. Ronan, with his strong, sad personality, is by far my favorite.
The last line of this book is crazy and I suggest having the second book on hand so you can start reading it right away.
For a sneak peak at the intense characters in this series, check out Cassandra Jean's fanart on tumblr. It's amazing. http://cassandrajp.tumblr.com/tagged/raven-boys