I just want to know why he's not recycling them. Burning them wastes the valuable resource of the paper. Recycling them, however, means more new books and new ideas can be generated from the material of the old. That is a model for efficiency and there is something poetic about it at the same time.
If he were prudent, he should, at a minimum, be listing these for a penny at Amazon, but I suspect nobody has shown him how. They'd move much more quickly and gross at least a tiny bit of income while not having to resort to the unpalatable tactic of book-burning.