Later on we will see how Julian fares in the same pursuit of conquering Persia if he has more luck and a larger/ better co ordinated army than in OTL. As well as the standard history works on Constantine, his sons, and Julian (mainly Charles Odahl on Constantine, Robert Browning on Julian, and AHM Jones on the Empire as a whole, backed up by Gibbon and from 353 the contemporary history of Ammianus Marcellinus ) , I used Gore Vidal's novel 'Julian' for these articles to get a flavour of the background and characters.
It's notable that there is very little published material in English on the Sassanid side of relations in this period or the internal history / dynamics of Persia, and when I was drawing up my initial version of this period as a student I mixed the Cambridge History of the Ancient World with the fictional depiction of the (earlier) Achaemenid court in Mary Renault's novel of Alexander the Great in Persia, 'The Persian Boy'.