1. A system for enhancement of printed reading material, comprising: a) an item of reading material, printed on a substrate having a machine-readable coordinate grid; b) a pointing device, configured to detect the coordinate grid on the substrate when placed in proximity thereto; and c) an output device, configured to receive input from the pointing device and to determine the location of proximity of the pointing device to the substrate, and to provide output corresponding to contents of the reading material associated with the location.