How can Amazon have Print on Demand books in stock that nobody has ordered yet?

Why would Amazon stock print-on-demand books?
Why would Amazon stock print-on-demand books?
The reason our prices are so low is simple. At BookLocker.com, we break even on setup fees, and earn our profits on book sales. That way, we and the author have a vested interest in the success of the book. The “other guys” get as much as they can out of authors up-front…
Instead of collecting money thru donation jars for your charity, consider publishing and selling a book.
After deducting your time and expense to sell copies to a bookstore, you can be pretty far in the hole.
My old publishers is still selling my book and that means they’re getting money from sales, and not sending me royalties!
“Somebody ordered the book and they got the first edition with the old cover. Why?”
How do you determine if a firm is likely to go belly-up? It’s EASY!
After thorough investigation, they would keep 80% of all sales, risk no money, and I had to pay over $6,000 up front just to get the ball rolling! Please help!
Avoid being scammed by freelance editors!
Ebook sales are down. Ebook reading device sales are down. Print sales are up. What does this mean for the future of books?