The Lost Hero (The Heroes of Olympus Series #1)
Really liked this one...I just wish I'd waited to read it until closer to time for the second book in the series to come out.
I wasn't sure how much I'd like the switching of perspective between the three lead characters, but it actually worked for me. I also like how the author is handling the whole Greek/Roman mythology thing.
It was great getting to revisit favorite characters from the Percy Jackson series and well as meet new characters, and all three lead characters are quite likable...with Leo being a personal favorite.