Danzel liked the idea so much, that he decided to stay with Shiro and work on those books.
Shiro would do the copying while he would try to make the book frame.
Which was much harder to do than he had anticipated.
First of all, Danzel had no glue of any sort to stick to any wood. Also, he quickly abandoned the idea of making the books out of wood as in his storage ring, he only had a few magic items and weapons. No tools of any sort.
Which forced him to rely on his newly acquired skill, [Bone Shaping] to make the actual books.
And once he started experimenting with this idea, Shiro gazed at him weirdly and faintly disgusted, though he ignored her.
'It's much harder than I had thought to be...' He said internally as his first prototype failed.
He tried to do something similar with Shiro's fox mask that was connected with her hood on those books, though piercing the paper with bones turns out to be a terrible idea.