1. A photo book for use with a photo book system including an electronic reader, the photo book comprising: an individual image; a multimedia file associated with the individual image; and an electronically readable code separate from and associated with the individual image and encoded with data configured to be electronically read by the reader for retrieving the multimedia file, wherein the electronically readable code is a graphical bar code that visually resembles the individual image such that the graphical bar code is useable as a thumbnail for the individual image, and wherein the graphical bar code includes a plurality of code blocks providing a two-dimensional representation of the data, the plurality of code blocks integrated with an intermediate halftone image of the thumbnail for the individual image.