It really feels like everyone is growing up in this book. The tension and anticipation builds well here, this is a great ramp-up for a final book. I like that as the books go on, Percy's solutions become more and more unconventional and fair. Annabeth lashing out at the Sphinx was the only part of the book that struck me as odd/unrealistic with what we've seen so far, it felt very out of place for her character. Looking forward to the conclusion!