Percy Jackson is back! Although, he is not quite sure who exactly he is since Juno has stolen his memory. He finds himself battling gorgon sisters all the way from Napa to the Berkeley HIlls where Juno leads him to Camp Jupiter, a Roman camp for demigods. Here Percy meets Hazel Levesque and Frank Zhang. Hazel is daughter of Pluto, and formerly of New Orleans and the year 1942. Hazel has a big heart and a big secret. Frank has yet to be claimed by his godly parent. He’s klutzy and his only friend in camp is Hazel. Oh, and Frank also has a secret. Frank and Hazel are members of the disgraced Fifth Cohort and have yet to win at war games. These two unlikely heroes are chosen by the camp’s  praetor, Reyna, to accompany Percy on an impossible quest to the north to save Camp Jupiter.