I can't think of anything I didn't like about this book. If you like Rick Riordan's books or any of the others from his imprint, you will like this one, too. I listened to the audiobook, which I think was a really good choice for me; it forced me not to rush through. It was really well read. In addition to good pacing & characters, I really appreciated seeing male and female best friends without it turning into  romance.