The canonization of the Hebrew Bible was an enormous goad to Jewish creativity. Across genres, styles, and languages, the Jews of the second temple period reacted to, interacted with, interpreted and re-interpreted, the words of the Bible, especially the Torah, in an extraordinary variety of ways with an extraordinary variety of results. The words of the Bible, especially the Torah, seem to have consumed the Jews to such an extent that they produced little literature that did not somehow engage the Bible and its concerns. Outside the Bible is a good entry point for the study not just of ancient Bible interpretation but also of ancient Judaism as a whole.There is also a favorable mention of Old Testament Pseudepigrapha: More Noncanonical Scriptures, vol. 1.
For more on Outside the Bible see here and links.