This has got to be by far my favorite book in the series. In a bajillion years, I couldn't stop reading and devoured it in TWO days. I've never been so happy with tears. 
 So much action, greatness, and an insight on the characters that I've never seen before - especially Nico! It was a sweet shock. I gotta say, even though people don't like Nico, he's my favorite along with Percy and Leo. 
 (view spoiler)[I ship them. I know, I know it can't happen, but feelings happen. Feelings about I don't give a shit and it's a free fucking world. But hey, it's just my opinion. I just gotta say, I've never thought that this type of thing would be shown in this series. But I'm all for it! (hide spoiler)] 
 5 Stars