Yuka stayed there for a little over an hour. Counting at a rate of one book a day, she took fifteen books in total.
In fact, the bookshelves of the Senju clan were mostly stocked with scrolls. Scrolls were heavy, and Yuka even spotted a few sealed scrolls, though she didn't even bother looking at those since she couldn't open them anyway.
Were those probably records of secret ninjutsu passed down exclusively within the clan, or perhaps forbidden arts?
Chapter 63