The Trial of the Rivers
All is going well for Lea as she finishes her time as a god, but when Nico goes mysteriously missing things take a turn for the worse. No longer welcome at camp, and with new power on the rise, Lea is doubting her decisions to stay mortal. Then when news from the gods comes, saying that Lord Hades has been overthrown, Lea and some other experienced demi-gods must travel west to take back the underworld.
(WRITTEN BEFORE THE RELEASE OF MARK OF ATHENA)
READ BOOK 1