heros of olympus test This is an easy fun test if you know your stuf about percy jackson ahead of time. hrm2001 published on November 24, 2012 Stacked 1/5 Who is in the son of Neptune? Percy Hazel and Frank All of the above 2/5 Who has the mark of athena in the mark of athena? Percy Annabeth Piper 3/5 Is there another book after the mark of athena? Yes No I don't know 4/5 Who is hazels half brother Nico Percy Frank 5/5 Who are the characters in the lost hero? Jason, Piper, and Leo Percy, Hazel, and Frank I don't know