No "book of Leviticus" eh?

Here's an interesting post from "The Amateur Exegete". about the The SBL (Society for Biblical Literature) Study Bible's Leviticus volume, noting that the Torah was put into five scrolls as is because of scroll length and that Leviticus, at least, doesn't stand out as a separate book.

I pull quote what Ben the Amateur has: 

Despite having its own title, there is really no “book” of Leviticus in any meaningful sense. Leviticus never existed as an independent literary or textual unit at any stage of its development or incorporation into biblical canon. The Pentateuch is not five independent books cobbled together but rather a single literary work presented in five volumes, the division having been based on the material limits of scroll technology. The essential continuity of Leviticus with what comes before and after is apparent from both a broad perspective and from a close reading. The very first words of the book, literally “He called to Moses,” lack an explicit subject in Hebrew; the English addition of “the LORD” is assumed from preceding verses at the end of Exodus. Who Moses is, where and when the events of Leviticus take place, what the nature and historical background of the relationship between Israel and its deity is – none of these are explained in Leviticus itself but are dependent on the story that has been told from the beginning of the Pentateuch to this point.

Interesting, per the author, no translation of Leviticus puts "The LORD" in square brackets at the start of Leviticus 1:1, not even the new RSV.

That said? Here's the end of Exodus 40:

34 Then the cloud covered the tent of meeting, and the glory of the Lord filled the tabernacle. 35 Moses was not able to enter the tent of meeting because the cloud settled upon it, and the glory of the Lord filled the tabernacle. 36 Whenever the cloud was taken up from the tabernacle, the Israelites would set out on each stage of their journey, 37 but if the cloud was not taken up, then they did not set out until the day that it was taken up. 38 For the cloud of the Lord was on the tabernacle by day, and fire was in the cloud[a] by night, before the eyes of all the house of Israel at each stage of their journey.

And, the start of Leviticus 1:

1 The Lord summoned Moses and spoke to him from the tent of meeting, saying, 2 “Speak to the Israelites and say to them: When any of you bring an offering of livestock to the Lord, you shall bring your offering from the herd or from the flock.

There you are. It is a "flow" of sorts. 

I do think Baden overstates his case, though.

Genesis as seen today was presumably a separate unit. It stands separately, being pre-Egypt times except for the tail end. Only the Tesserateuch, to riff on Tatian, is really a single unit. (On biblical criticism, I still believe in some version of the old documentary hypothesis. I believe that there is a separate E source, and that it and J were written, revised, edited and updated in response to each other in a sort of scriptio continua, to riff on the Catholic, Orthodox and mainline Protestant lectionary term. There is of course no D material until Deuteronomy, and there, there's multiple D layers, with perhaps the earliest being what Moses Wilhelm Shapira found, per Idan Dershowitz. Or, Genesis, a "Triteuch" then Deuteronomy. See also Dershowitz and my take on the documentary hypothesis in general. And, per a 2009 book by him that's a revision of his PhD thesis, he appears to broadly agree with me.

On the matter at hand, I don't know if Baden addresses this, but the issue is WHY the Exodus-Leviticus division is where it is on modern scrolls. Exodus 35, after the second giving of the tablets of the Ten Divarim, gets to Yahweh's instructions for the tabernacle, the ark of the covenant and such. Breaking Exodus after chapter 34 and attaching the rest to Leviticus makes much more sense.