What is the mark of Athena?

Answer 1

In The Son of Neptune, Percy, Hazel, and Frankmet in Camp Jupiter. They traveled to the land beyond the gods (Alaska) to complete a dangerous quest. The third book in the Heroes of Olympus series will unite them with Jason, Piper, and Leo. But they only have six demigods. Which demigod will complete the Prophecy?

The Greek and Roman demigods will have to work together to be able to defeat the giants set free by the Earth 'Mother", Gaea. Then they will have to sail together to the ancient land to find the Doors of Death.

With old and new friends, a wonderful ship and lots of enemies The Mark of Athena is another great book by Rick Riordan.

Narrated by four different demigods, The Mark of Athena brings together the Greek and Roman characters from The Lost Hero and The Son of Neptune. In a ship called the Argo II, seven demigods travel by air across the United States and by sea to Rome on their quest to defeat the Earth "Mother", Gaea. Meanwhile, a war is starting between the Roman and Greek (at Camp Half-Blood) demigods they left behind, and only Annabeth holds the key to peace.