Love how Percy just casually drops lore all throughout the Son of Neptune. Frank and Hazel are getting the encyclopedia knowledge on every monster they encounter plus some extra side stories from how he fought them in gym classes and "oh yea, I had a fist fight with Kronos in Manhatten."
And then they meet Annabeth and realize that behind every goofy looking powerful guy, there's an incredibly smart, capable and even more powerful woman who makes sure he doesn't die on a daily basis and are like, "oh. thats why he's still alive."
I will never understand how Odysseus has all the braincells while also having none of them at the same exact time. He is an amazing war general and is insanely smart but has the attention span of a rat fuelled by the need to cause chaos simply because he is bored. He can't listen to one thing while getting distracted by the thing he was specifically told not to touch.