The Son of Neptune released on October 2, 2012 and "The House of Hades" was released on October 8, 2013 The Blood of Olympus was released on October 7, 2014. The Son of Neptune The Son of Neptune is a 2011 fantasy-adventure novel written by American author Rick Riordan, based on Greek and Roman mythology. It is the second book in "The Heroes of Olympus" series, preceded by "The Lost Hero" and followed by "The Mark of Athena". The story follows the adventures of amnesiac Percy Jackson, a demigod son of Poseidon, as he meets a camp of Roman demigods and goes to Alaska
Neptune this had been officially approved by the French Bureau des Longitudes. In October, he sought to name the planet "Le Verrier", after himself, and he had loyal support in this from the observatory director, François Arago. This suggestion met with stiff resistance outside France. French almanacs quickly reintroduced the name "Herschel" for Uranus, after that planet's discoverer Sir William Herschel, and "Leverrier" for the new planet. Struve came out in favour of the name "Neptune" on 29 December 1846, to the Saint Petersburg Academy of Sciences. Soon, "Neptune" became the internationally accepted name. In Roman mythology, Neptune was the god