Mike, I am not able to help you on the Publish on Demand, but I do NOT like CDs. I think they are worth about ten percent of what a book is worth, or less. No comfort holding them in your easy chair. I think the guy's name was Skinnerton and he published miliatary type books with a slick paper cover and nice appearing inside paper with color. I talked to him years ago and he said he could deliver such books under ten bucks with overseas publishing. Times have changed a bit, but ??? There are a few gun related books that broke up a list of makers into alphabetical or regional order in order to get all information in two or three books. Seems like such partial books might sell better than books on one maker, only. Just my two cents.