Not very effective
I've had much better success using microfiber cloths than the Dirt Eraser from Absorene.  It is vulcanized rubber and spongy -- essentially they took an old fashioned eraser for pencils and blew it up into a dense foam.  I think using an eraser sold for erasing pencil, the softest you could find, would work better for cleaning papers and books.<br /><br />I can't recommend it as a tool for cleaning your collectable books.  I haven't tried it on soot covered walls.
Rating: 1 stars