How to Make a Nagamari Book

The way that the nagamari books were made is that you can imagine this spectacular leather cover being laid flat on a table in front of you and then a stack of papyrus sheets placed on top. If you have a leather thumb or piece of thread you pass it through one of the holes it comes into the inside of the paper and goes out or the pyros and then goes out the other side and you knot it outside the book. It's tied or knotted rather than sewn in a sense like a ring binder do you mean i'm sort of imagining a ringbinder it's got little clippy things with and the papers got holes how's how best to describe