 Author Joseph Raymond calls Josephus "the Jewish Benedict Arnold" for betraying his own troops at Jotapata.The works of Josephus provide crucial information about the First Jewish-Roman War and also represent important literary source material for understanding the context of the Dead Sea Scrolls and late Temple Judaism.Josephan scholarship in the 19th and early 20th centuries took an interest in Josephus's relationship to the sect of the Pharisees.