[scovetta]

Take photos of them, or cut the binding and scan them all, and then feed the work out to mechanical turk?

[chrisjj]

Or avoid cutting by using a book scanner e.g. https://www.amazon.co.uk/CZUR-Professional-Document-Auto-Fla...

[jhayward]

This is likely the fastest and cheapest option. Pennies per page. Double- or triple- assign them when they show signs of large differences between expected grammar, word choice, or spelling patterns.