Look into commercial book scanners that use vacuums. This is a solved problem. Kirtas is one of those manufacturers.

https://www.youtube.com/watch?v=ds63ZBXFdLM http://www.kirtas.com/

50 pages per hour with no damage to the books.

You're looking at $50k-$90k for the equipment plus $8k/year service contract, though. So you need to figure out whether book scanning is something that the Internet Archive is interested in, beyond this project.