E-BOOK ADVERTISEMENT SYSTEM, E-BOOK ADVERTISEMENT METHOD, CLIENT DEVICE, ADVERTISEMENT-PROVISION DEVICE, PROGRAM, INFORMATION-RECORDING MEDIUM, AND E-BOOK UPDATE SYSTEM

摘要

In order to update advertisements in an e-book based on contents which a user has browsed and has paid attention to in the e-book, a client device (10) is configured to: acquire an e-book including a text page and an advertisement page; display at least a part of a page included in the e-book on a touch panel (12); switch, when a page switching operation is received from a user, the page displayed on the touch panel (12), and zoom in and display, when a page zooming-in operation is received from the user, a specified part on the page displayed on the touch panel (12); and update the advertisement page based on advertisement data, the advertisement data being acquired, based on a history of the page and the zoomed-in part displayed on the touch panel (12) and associated with an advertisement subject selected from advertisement subjects determined in advance for the page and the zoomed-in part.