In The Son of Neptune, Percy, Hazel, and Frank met in
Camp Jupiter, the Roman equivalent of Camp Halfblood, and traveled
to the land beyond the gods to complete a dangerous quest. The
third book in the Heroes of Olympus series will unite them with
Jason, Piper, and Leo. But they number only six--who will complete
the Prophecy of Seven?
The Greek and Roman demigods will have to cooperate in order to
defeat the giants released by the Earth Mother, Gaea. Then they
will have to sail together to the ancient land to find the Doors of
Death. What exactly are the Doors of Death? Much of the prophecy
remains a mystery. . . .
With old friends and new friends joining forces, a marvelous
ship, fearsome foes, and an exotic setting, The Mark of
Athena is be another unforgettable adventure by master
storyteller Rick Riordan.