I cannot bring myself to treat a book that way... even a cheap, used one. Every book has a story to tell, a lesson to teach. Some teach it well, while others do not. Some bring positive lessons (do this), while others bring negative ones (Do not do this). But all have something to say, or else the author would not have taken the time to put pen to paper.

If I were in an emergency situation, I would try to use other things as tender or TP before using the pages of a book.

But then, I am an unabashed bibliophile.