Provenance
Alcuin was indeed a famous 8th-century English abbot, but he would not have produced a translation in the English of the King James Bible, living as he did in the era of Anglo-Saxon and ecclesiastical Latin, so the provenance of the text was immediately suspect. There is an implausible introductory account by Alcuin of his discovery of the manuscript in Persia and its history since the time of Jasher, and an equally unlikely commendation by Wycliffe the pre-Reformation bible-translator.
Read more about this topic: Book Of Jasher (Pseudo-Jasher)