The Mark Of Athena (Heroes Of Olympus Book 3) is part of Rick Riordan’s The Heroes Of Olympus series. Taking off from where Son Of Neptune left off, the book tells the story of Greek and Roman demigods, in an alternating set of narratives.The book begins About the AuthorRick Riordan is an American mythology author. His series of books on Egyptian and Greek mythologies have won him several awards, like the Mark Twain award in 2008 and 2009. The Mark Of Athena is one of his most popular books, having sold over 3 million copies. He lives in Boston with his wife and two sons.