Oh, God, CLIFFIE!?! Thankfully I already have book four!
Based on the title, it could be concluded easily that Annabeth, as the daughter of Athena, would be one of the narrators. Unfortunately, I also found her to be the reason why this book wasn't as perfect as book 2, personally. I thought she was, I dunno, a slight drag in the beginning. I did admire her finishing the quest though, to find that one item that started the eternal hatred between the Greek and the Roman. However, for the most part, her chapters were the one I liked less.
The other narrators, Leo, Piper, and Percy, were wonderful. Leo's attitude might be slight annoying at times, but I knew that he used humor to protect himself. It was the only way he knew how. Piper was admirable in her own way, being probably, the only daughter of Aphrodite that doesn't care about her own look. And her. charmspeak was amazing
... and of course, Percy, the glue of the seven, just when I thought he couldn't impress me more, he decided to stay with Annabeth and let the two of them fall to Tartarus. Seriously, Percy??! If you tried to outdo yourself, you just completely succeeded...