In the last post, I mentioned the comparisons between Second Peter and the Jewish testamentary genre. Thus, I want to call attention to Phillip J. Long’s overview of the Testaments of the Twelve Patriarchs and his introduction to its opening Testament of Reuben. There are older translations and online links about the text on the Early Christian Writings webpage.
Phillip J. Long on the Testaments of the Twelve Patriarchs