US Patent 8423889 Device specific presentation control for electronic book reader devices

Techniques for delivering digital content to be rendered on electronic book (“eBook”) reader devices are described. The eBook reader devices have different technical features, particularly in terms of display capabilities and navigational capabilities. For instance, eBook reader devices may have differing screen sizes, use different types of display technologies, and have varying browser functionality. The techniques described in this disclosure provide for ways to efficiently and effectively deliver content to various types of reader devices, and to control presentation of that content on individual devices.