I loved everything about this! Probably one of the most entertaining books I have ever read and super funny! Apollo would just say or think something that would make me laugh out loud. It was hilarious and I really enjoyed that. It was interesting and great to see Apollo's development through the book, like wow, he definitely wasn't the same in the end as he was in the beginning! It will be interesting to see how he continues to develop in the next books. 
 I really, really loved seeing Rick's old characters and obviously I was thrilled each time Percy showed up! He will just always be my favorite. And even if we didn't see some of the old characters, we got to know what they were doing! There was more about Will, and Nico was just hilarious with his "doctor's orders". Loved that, too. The new characters were great, too, and I really like Meg and her story. And geez, the overall plot and the bad guys? That's going to be interesting. 
 Everything that happened in the end? Exciting, funny and intriguing! A new trio was formed and hmm, we have to see how that goes... :D