This book was almost perfect. I say almost because I really wanted Percy's and Annabeth's POVs in the book, but it still worked without them. However, Nico's and Reyna's POVs were definitely worth the switch off. I have been dying to read in Nico's POV for ages, and in this final book I finally got my wish. Oh man, Rick didn't disappoint. Nico's was by far my favorite POV. Reyna's was second and Leo's was third. Ugh, everyone's character development was so utterly perfect. I shed a few tears at some scenes, but mainly when Hades had that moment with Nico in the tomb. How he told him he wanted him to be happy broke my heart because here is the coldest god of Olympus, telling his son he wants him to be happy and is proud of him for who he is regardless of his sexuality. I wish more parents were like Hades in that moment. Other things had me bursting out laughing, and it was always the weird little things. My favorites were "No. Not merchandising rights!" Hedge forcing Nico to drink some Gatorade, Aesclepion having BAMF as one of his titles, and Annabeth high five-ing Nico. 
 I always had a feeling the end was what would happen and for the longest time I stressed and worried because Leo is one of my favorite characters and I just wanted him to be happy. Things worked out though! He got his happy ending too and I'm so freaking happy. 
 Everyone got their happy endings and I loved it. My favorite was definitely Nico's though. He stays and he finds new love in Will Solace and I was just squealing from happiness because he was flirting and I hope they have a wonderful relationship. Also I found it a little funny since Will's last name is Solace, and that is exactly what Nico finds in him, solace and comfort. Rick ended one of my favorite series of all time beautifully and in the best way possible. Thank you for taking me on this journey Rick, these books will always hold a special place in my heart. I can't wait for Magnus Chase!! 
 OH AND I AM SO HAPPY THIS WAS MY 100TH BOOK OF THE YEAR!!! IT WAS DESTINY!!