1. A computer based library and information delivery system for accessing and obtaining selected digital information files, said library and information delivery system comprising: a library server having a plurality of digital information files; a client computer system coupled to said library server over a network; and a mobile device removably connectable to said client computer system, said client computer system including logic for requesting a download of a selected one or more of said digital information files from said library server, said client computer system further including logic for downloading said selected one or more of said digital information files to said mobile device.