You seriously think that the entire population of Jews had just one single copy of the bible. Most Jews didn't even live close to Jerusalem. How could they all be reading daily Torah portions if they had to travel over a day to get to that one single book? Plus wouldn't it be a bit crowded, having thousands of Jews huddled around trying to read that one single book? I mean, just use a little logic here.
I missed where there were ancient Jewish publishing houses. They didn't find that scroll/law book in some random dude's bedroom wall ... it was a priest's, IIRC. We are so used to ubiquitous literary presence that we forget it took years to make even a single book.
History of Printing
History of Scribes
Early writing
Before the printing press
Not only were books rare because of the time it took to make them, but not only the audience but many copiers were illiterate. Do you know the frustration of helping non-English speakers with corporate documentation, only to be told "what is 'a'"? Spanish uses the same alphabet English does, with some extra squiggly symbols as well. I had to help people who didn't know their own frickin' alphabet. You want me to believe that ancient people were highly literate with mass produced literature? HAHAHAHAHAHAHA! Ten bucks says that the reason people kept worshipping other gods in the bible is that they never read the texts the priests made up in the first place.
edit:
I can see how this conversation went:
People: Yay, other gods!
Priest: No! You cannot have another god!
People: Uh ... we've been having this setup since before your granddaddy was born. What changed?
Priest: I have a sacred book.
People: Can we see it?
Priest: No, I'll just tell you what it says.
People *snatches scroll*: This is a bunch of squiggles.
Priest: IT IS A SACRED TEXT ... WORDS STRAIGHT FROM GOD'S MOUTH!
People: God doesn't need texts to talk to us. That's what "prayer" is for, as well as ritual and dreams an' stuff.
Priest: This is sacred!
People: We think the priests need to justify their paycheck again. Hence "texts" were invented to prove to us that squiggles equal divine mandate.
Priest: Kill them all!
People: Holy crap!