Complex sentence: Using something that the author calls the Peshto technique, the author purports to have uncovered evidence that effectively contradicts all the available biblical information regarding the nature of Jesus and his mission-that Jesus was the leader of a radical faction of Essene priests.
Split into simpler sentences: Using something that the author calls the Peshto technique, the author purports to have uncovered evidence that effectively contradicts the biblical story regarding the nature of Jesus and his mission. The book states: Jesus was the leader of a radical faction of Essene priests.