Here are two quotes that deal with biblical canonicity as it applied to the early Christian congregation:
"While the New Testament writers all used the Septuagint, to a greater or lesser degree, none of them tells us precisely what the limits of its contents were. The 'scriptures' to which they appealed covered substantially the same range as the Hebrew Bible [which did not contain the apocrypha]" (F.F. Bruce, The Canon of Scripture, pp. 50ff).
Jerome himself wrote: "Therefore as the church indeed reads Judith, Tobit and the books of Maccabees, but does not receive them among the canonical books, so let it also read these two volumes [Sirach and Parables] for the edification of the people but not for establishing the authority of ecclesiastical dogma" (Prologue to the books of Wisdom).
One Jewish perspective on the Hebrew canon is given here: http://www.myjewishlearning.com/article/creating-the-canon/
I would still recommend Roger Beckwith's 500-page+ study on this issue.