This story. Holy Moley it just keeps getting more interesting. 
 Athena, Luke, Aphrodite, the Hunters, Hades, Holy Crap Atlas, double Holy Crap Nico and Bessy. 
 I liked how we found out (or rather confirmed, as it's pretty clear from the three books) Percy's fatal flaw. Really I just enjoyed that whole conversation. And the conversation with Poseidon. 
 I don't know how to write about series books clearly. But I liked it. And am ready for the last two. and then Heroes of Olympus, at least I think I am.