<P> The Dark Prophecy is the second book in the series . It was released on May 2, 2017 . </P> <P> The book continues the story of Apollo as the mortal Lester, as he leaves the safety of Camp Half - Blood and journeys across North America to restore the remaining four Oracles and defeat the triumvirate of Roman emperors - turned - Gods, while also being helped by Leo Valdez, the now - mortal Calypso and Festus the bronze dragon . </P> <P> The Burning Maze is the third book in the series . It is scheduled to be released on May 1, 2018 . </P> <P> A companion book titled Percy Jackson: Camp Half - Blood Confidential was released on May 2, 2017 . </P>

When is the trials of apollo 3 coming out