A method for supplying hierarchical supplementary information related to printed books in a portal can include several steps. The method can include the steps of first establishing a portal of supplementary information related to printed books. Second, a plurality of different printed books can be distributed to a user base. Third, each different printed book can be associated with a common uniform address. Fourth, a kiosk can be provided for interacting with the portal. Fifth, a user-specified common address can be received from a user in the user base through the kiosk, the user-specified address corresponding to the printed books. Sixth, upon receiving the user-specified common address, a first hypermedia document corresponding to the user-specified common address can be displayed through the kiosk in the portal. The seventh step can include identifying in the first hypermedia document corresponding to the user-specified common address a user class associated with the user. Finally, in response to identifying the associated user class, one of the secondary hypermedia documents can be displayed through the kiosk, the secondary hypermedia documents having supplementary information pertaining to the book associated with the user-specified common address. Moreover, the supplementary information can be consonant with the associated user class.