In The Lost Hero, three demigods named Jason, Piper, and Leo made their first visit to Camp Half-Blood, where they inherited a quest:
Seven half-bloods shall answer the call,
To storm or fire the world must fall.
An oath to keep with a final breath,
And foes bear arms to the Doors of Death.
Who are the other four mentioned in the prophesy? The answer may lie in another camp miles away, where a new camper has shown up and appears to be the son of Neptune, god of the sea. . . .
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![Cover Art for B0140D7GNG, [(The Son of Neptune )] [Author: Rick Riordan] [Oct-2011] by Rick Riordan](/covers/generated/p/41246700-cd7c437aac66.svg)
![Cover Art for 8601300118932, [ Heroes of Olympus: The Son of Neptune ] [ HEROES OF OLYMPUS: THE SON OF NEPTUNE ] BY Riordan, Rick ( AUTHOR ) Oct-04-2012 Paperback by Rick Riordan](https://cdn.booko.info/variants-production/871bb30c58483894/500x750.jpeg)
