I did this on some pages of a very old family Bible for documentation of relatives. Names written in pencil, probably in the 1800s or so, barely readable. So I got a 15MP Canon point & shoot camera (which had one of the largest file sizes I could find at BestBuy). Laid the pages under the chandelier-style light in the living room, on the coffee table. Positioned the camera and myself as to not cause any shadows. Then did a few shots of each page. In the back was a thick page into which some old glass plates/photographs were inserted. Although the writing was not that visible, with the 15MP image, they were much more readable, as the pictures on that back page were much more plain, also. I was surprised at how well it turned out. Copied the pictures on the memory card into a file and emailed it to the distant relative seeking to get entry into the Jamestown Society. It worked.
Years ago, one thing I did to old, dried car parts boxes to clean them up was to gently wipe/remove the dust with a rag lightly damp with ArmorAll or STP Son of a Gun protectant. In addition to cleaning, it renewed the moisture in the inks (apparently) and made it all look decades newer than it was. Might not work too well with brittle and wrinkled paper, though.
Just some thoughts,
CBODY67