The process of ordering books only to find an error, yet cannot cancel is absurd. With several hundred pages it is easy to miss something after having ordered a proof. Then, one cannot go back and cancel an order even prior to going to press, let alone an hour later. So then, you have one bad print in the hopper coming out of the bank account and STILL have to order a print copy and pay for shipping. There has to be a better way of tracking and even Stop The Presses! Even if there is a smaller fee than the full press plus ship to offset Lulu's payroll costs, etc.
Or with a digital approval, click a Waiver box accepting full responsibility for errors. Some of us who have Text and/or BW orders do not care about paying for and receiving a print before being able to approve and move the process along.