I would think people then could have used many different formats. They were smart people and could have easily used a format different than the normal papyrus or animal skins.
I want to hear more about this story.
Potentially very exciting if these are genuine.
“... the books were papyrus scrolls of that time, not the sort of leaved lead pages we see here.
***I would think people then could have used many different formats. ****
A couple of the Dead Sea Scrolls were written (engraved) on thin copper.