From Origins (Book 3)
by Mary Ting
Faced with an impossible choice, Skylar and the other descendants embark on a deadly quest to the underworld to confront Hades, who has been plotting to kill them all. They discover the ancient gods are not dead, as once believed, but are instead held captive in a secret location. In order to save the world from destruction at the hands of Hephaestus, the descendants must rescue their ancestors.