this is a book bound into slate form!
basically you need 5 in. of rockslate for every foot of book you bind into it.
not sure of the spell needed though,will need help there.
Uhhmmm... Huh? Why would you want to turn a book into stone (brittle, easily broken stone at that). It would be a MuTe-He effect, BTW.
I was thinking of a magical equilivent of a ebook.