Book: The book is amazing I love how Nico and Will along with the oracle (Rachel Dare Elizabeth) play huge roles and I love Apollo's humor when at the edge of chaos thinking how he would tell python that they could just sit down and watch each other turn to dust.
Ending: The ending was really sad for me because its the end of the trials of Apollo but I feel relieved because no more people will have to sacrifice to get Apollo back to godhood and Apollo kept his promise to Jason (Son of Zeus/Jupiter) by remembering his time as a human and he visits people and places he visited during his time as a human he questions himself whether he is worthy of being a god or not.
Edit: So i was just reading the reviews and I apparently see someone named Mason Gay puts a 1 star saying that he could write better. That's not nice you should at least appreciate what uncle Rick has done for us. Btw I feel like annebeth is now the most important character in the rick universe because she shows up in 4 out of 5 of the series. (PJO, HoO, MCGA, ToA)