A system for enhancement of books or other reading material includes an item
of
reading material, printed on a substrate having a substantially invisible, machine-readable
coordinate grid. A pointing device is configured to detect the coordinate grid
on the substrate when placed in proximity thereto. An output device receives input
from the pointing device to determine the location of the pointing device relative
to the substrate, and provides output corresponding to contents of the reading
material at the location. The output may be in the form of audio and/or video.
