Abstract: A system comprising an electronic book and a propriety appendage couplable to the electronic book; the electronic book comprising a visual display screen, a data reader, navigational tools and a first section of a unique identification code for identifying the electronic book; the propriety appendage comprising a memory and a second section of unique identification code; such that data in memory of proprietary appendage having second section of unique identification code can only be accessed when proprietary appendage is connected to an electronic book having first section of unique identification code.