I am having so much fun rereading this series for the third time (well, I only reread the first three before). The Titan's Curse is the book where the stakes are raised in the series. The Quest for Artemis is one of my favourites in the whole ReadRiordanverse. I love the introduction of both the Di Angelo siblings and the Hunters of Artemis. I love that we get to see Thalia in action after all the stories you read about her. The only downside is a severe lack of Annabeth, however, the presence of Thalia and the Hunters of Artemis, especially Zoe Nightshade make up for her absence.

The Hoover Dam chapter is iconic. Rachel Elizabeth Dare is iconic. Shoutout to Bessie.

Spoiler

But mostly the sacrifices within this book by Bianca di Angelo and Zoe Nightshade is why I love this book as much as I do. It shows that death in this series is very real. Up until this point, there had been no (permanent) character deaths. The Titan's Curse changes that up and raises the stakes in the last two books as the danger of the quests rise as well. As well as the partial responsibility Percy feels towards the death of Bianca and Zoe because he feels that he failed them. This also ties into his fatal flaw, personal loyalty, as Athena points out near the end of the book. Percy will go to the end of the earth to save his friends. Lastly, I want to point out that I love that Percy chooses to be the child of the prophecy and takes the responsibility so it does not have to fall onto Nico's shoulders.