. "The Lost Hero"@en . . . . . . . . . "The Son of Neptune is the second book in The Heroes of Olympus series written by author Rick Riordan. It was released on October 4th, 2011, a week earlier than originally planned. The story takes place around six months after the previous book, The Lost Hero."@en . . "The Son of Neptune is a forthcoming 2011 fantasy-adventure novel based on Greek and Roman mythology, written by author Rick Riordan. It is the second book in the Heroes of Olympus, following The Lost Hero in the series The Heroes of Olympus, the sequel series to the Percy Jackson & the Olympians series."@en . . . . . . . "The Son of Neptune"@en . "The Son of Neptune"@en . . . "544"^^ . . . . . "The Son of Neptune is the second book in The Heroes of Olympus series written by author Rick Riordan. It was released on October 4th, 2011, a week earlier than originally planned. The story takes place around six months after the previous book, The Lost Hero."@en . "The Mark of Athena"@en . . . "The Son of Neptune is a forthcoming 2011 fantasy-adventure novel based on Greek and Roman mythology, written by author Rick Riordan. It is the second book in the Heroes of Olympus, following The Lost Hero in the series The Heroes of Olympus, the sequel series to the Percy Jackson & the Olympians series."@en . . "Fall 2011"@en . . . . . . . . . . . "The Heroes of Olympus"@en . . . . . . . ""@en . . . . . . . "2011-10-04"^^ . .