2. A computer-implemented method as described in claim 1 , wherein the history includes references made by other users, the other users other than a user associated with an e-book-reading device on which the method is performed.
2. A computer-implemented method as described in claim 1 , wherein the history includes references made by other users, the other users other than a user associated with an e-book-reading device on which the method is performed. 4. A computer-implemented method as described in claim 2 , wherein the references of the other users include reference to the page in an online encyclopedia or online dictionary.