One Way to Use Old Books

Found this site today: Upon a Fold.
Of course the page I happened upon was from years ago - the Holland Paper Biennial in fact.

Anouk Kruithof

What an awesome way to use old books.  Would need to have a lot of patience to collect them.  Maybe you could just stain the pages at one end of a book.  Round up all the leftover from a book or school fair.  They just get sent to the tip otherwise.