A lot of your books are reference books. For example, I have just bought "Linux in a Nutshell", 900 pp of great reference material. I keep it on my desk. BUT it won't lay flat. It will be worn out (and the spine broken) before the next edition appears.
It would be really nice if you made such books in hardback, so they are more robust and can be laid flat. The actual cost of production of the book is a minimal part of the (High $50) price. How about it ?
We like this idea too, and have a couple of hardback experiments in the past, though had few actual customers. There are a number of how-to guides that will help you do this on your own, such as http://www.instructables.com/id/How-t... from Instructables. You can also check with your local library and ask about their services. Most have their own equipment, and some take it outside work at a modest fee.
Good luck. --Allen