I have written before about book scanners. You place the book in the scanner, press a button, and then walk away for a while as the scanner turns pages automatically and creates a digital image of every page in the book. It employs a robotic mechanism to flip through the book and has cameras that take an image of each page.
With most book scanners, you don't even need to cut the bindings off the books being scanned. Now newsletter reader Jay Crossman wrote to let me know of a new beast to be available soon that will scan 250 pages per minute. That's roughly 4 pages per second!