For me,I'm just turned my attention on this series recently after I read famous Harry Potter one,Percy and Harry really got something same, their brave is very similiar,always want to be on the first,they are friendly,too,that's their great thing,they are favour on sacrifice themselves to help and save their friends,there's always dieing in oir life,so as them,t godess appear in the book is Artemis,the assistant Zoe nightshade and Bianca di angelo had died for her,even more,stories became more interesting,many demigods had appeared,like Thalia,daughter of Zeus,Percy Jackson,son of Poseidon,Bianca and Nico di angelo,both are the before-oath kids of Hades,that's the most scared things,Percy and Nico both possible to become the kids who.help Kronos to destroy the Olympus becauseof the prophecy,