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 (mythology) In another place of his work, book VI, Nigidius wrote that, according to the Etrusca Disciplina, his were one among the four "genera", types of Penates: of Iupiter, of Neptune, of the underworld and of mortal men. According to another tradition related by a Caesius, also based on the same source, the Etruscan Penates would be Fortuna, Ceres, Genius Iovialis and Pales, this last one being the male Etruscan god ("ministrum Iovis et vilicum", domestic and peasant of Jupiter). Neptune is depicted in the 7th and final movement of Gustav Holst's orchestral suite 'The Planets', subtitled 'The Mystic' as Holst