7. A computer-implemented method comprising: under control of one or more processors configured with executable instructions, performing machine-based optical character recognition on individual pages of a print version of a book to obtain page labels and page text from the individual pages; finding positions within an electronic version of the book that correspond to individual pages of the print version, wherein the finding is based at least in part on: autocorrelation between the page text and the electronic version to identify a plurality of candidate positions for respective ones of the individual pages, and comparing the page text and text of the electronic version at the plurality of candidate positions to select found positions from the plurality of candidate positions determined from the autocorrelation; and associating the found positions within the electronic version with the page labels of the corresponding individual pages of the print version.
14. The computer-implemented method of claim 7 , further comprising: creating a page/position map table that indicates correspondences between page labels of the print version and positions within the electronic version; and in response to user entry of a page number, referencing the page/position map table to find the corresponding position within the electronic version.