Who Killed Apollo and Julian Augustus?

Who killed him? That is the question. Julian Augustus Roman Emperor from 361-363 A. D. initiated reform of the Roman bureaucracy and state religion immediately on assuming office. After dismissing many civil servants he eliminated Christianity as the state religion reversing the policy of his two immediate predecessors. Instead Julian proposed that all religions flourish freely. In parallel to his reforms Julian attempted to destroy the Persian Empire after centuries of unsuccessful Roman efforts. This novel recounts Julian's reign through the eyes of Oribasius Julian's trusted physician. At the climax of Julian`s successful campaign in Persia he was assassinated. Who killed Julian? Was it the same conspirators who silenced Apollo's Oracle at Delphi? Was it the Christian hierarchy angry Roman military officers laid-off eunuchs humbled Persians disaffected Jews or unemployed Christian educators? They were all affected by Julian and had motive means and opportunity.