ELECTRONIC BOOK ADVERTISEMENT SYSTEM, ELECTRONIC BOOK ADVERTISEMENT METHOD, CLIENT DEVICE, ADVERTISEMENT PROVIDING DEVICE, PROGRAM, AND INFORMATION RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To update advertisement in an electronic book based on contents which a user has browsed and paid attention to in the electronic book.SOLUTION: A client device 10 performs following steps: acquiring an electronic book including text pages and advertisement pages; displaying at least a part of the pages included in the electronic book in a touch panel 12; switching a page displayed in the touch panel 12 when it receives a page switching operation from a user; enlarging a designated part of a page displayed in the touch panel 12 when it receives a page enlargement operation from the user; and updating the advertisement pages based on advertisement data related to advertisement objects which are selected from predetermined advertisement objects for pages or enlarged parts which are acquired based on a history of the pages and the enlarged parts displayed in the touch panel 12.