[pbhjpbhj]

If you release it CC then by the afternoon a bookshop with a instant book printing system could be selling the book in competition to your publisher.

This does probably hinge on what is meant in CC license (CC-BY-NC presumably would be applied) by "non-commercial". I know under copyright law giving away for free can still be commercial as it can harm commercial activity of licensees/owners; but I've read elsewhere that CC allows cost of production to be recouped and still allow the sale to be allowed as NC.