The Jewish World around the New Testament
New Testament texts cannot be adequately understood without careful attention to their Judaic and Second Temple roots.
From the Introduction
Most New Testament scholars would now agree that the New Testament writings belong wholly within the Jewish world of their time. However much some may be in serious conflict with other Jewish groups, these disagreements take place within the Jewish world. Even New Testament works authored by and/or addressed to non-Torah-observant Gentile Christians still move within the Jewish world of ideas. Their God is unequivocally the God of Israel and of the Jewish Scriptures that they treat as self-evidently their own. Jesus for them is the Messiah of Israel and the Messiah also for the nations only because he is the Messiah of Israel.
From Chapter 14
The NT student and scholar must use the Jewish literature in the first place to understand Judaism. Only someone who understands early Judaism for its own sake will be able to use Jewish texts appropriately and accurately in the interpretation of the NT (p. 211).