This is my least favorite Rick Riordan book. The two big issue I had were Percy and Nico. For a while Percy starts to shows signs that he's beginning to become like Luke. He scared the crap out of me and this is never addressed in this book or the finale. Then there's Nico. Where to start? Well, first there's the fact that he suddenly lost the ability to interact with people who weren't Percy. In the previous series we've seen him get along ok with others. Him suddenly becoming a creep made no sense to me. The there the "big reveal", which is that he's gay. This part was awful. He is forcibly outed by a god. I know that it's shown as a wrong thing for Cupid to do, but that is a bit lost when it feels like the whole reveal of him being gay was meant to shock readers. NO! I might not like Nico as a character, but this was just wrong. The rest of the book was ok, although I didn't care for the part where Leo ends up on Calypso's island. Oh, and I don't get why Calypso would curse Annabeth. She had no hostility towards Percy in the end, it also just makes her seem petty. Percy wasn't the first guy she fell for that would have ended up with someone else. Not by a mile. So did she curse the others too? Also, if she's willing to stand up for the Olympians, the very people who imprisoned her in the first place, then why would she do that?
Ok. . . NOW my little rant is over.