Abstract: An ebook is represented as a plurality of ebook pages associated with a plurality of segments. A navigation command is received from a user, the navigation command requesting a navigation graphical user interface (GUI) in a particular navigation mode of a plurality of navigation modes. One or more ebook pages, of the plurality of ebook pages, are identified for page thumbnail generation, and page thumbnails are generated for each of the identified one or more ebook pages. The generated page thumbnails are grouped by segment, using the plurality of segments. The navigation GUI is generated in the requested navigation mode using the grouped page thumbnails, the navigation GUI listing at least one segment, of the plurality of segments, and horizontally listing at least one page thumbnail associated with the at least one segment, and the navigation GUI is displayed.

Abstract: Locations and presentation orders of objects of interest (e.g., speech bubbles) in digital graphic novel content are identified such that expanded versions of the objects of interest can be presented to a reader. Specifically, digital graphic novel content is received and locations of interest regions (e.g., rectangular text regions of speech bubbles) in the content are identified by applying a machine-learned model to the content. Locations and presentation orders of objects of interest in the digital graphic novel content are identified based on the identified locations of the interest regions. The digital graphic novel content and presentation metadata including the locations and presentation orders of the objects of interest are provided to a reading device such that expanded versions of the objects of interest are presented to the user in accordance with the presentation metadata.

Abstract: An ebook is represented as a plurality of ebook pages associated with a plurality of segments. A summary view command is received, the summary view command requesting a particular type of summary view of a plurality of available summary views. One or more ebook pages are identified, for a summary view based in part on the requested type of summary view, and page thumbnails are generated for each of the identified one or more ebook pages. The generated page thumbnails are grouped by segment, using the plurality of segments. A summary view graphical user interface (GUI) is generated for the requested type of summary view using the grouped page thumbnails, the summary view GUI vertically listing one or more segments, of the plurality of segments, and horizontally listing page thumbnails associated with the one or more segments, and the summary view GUI is displayed.

Abstract: An ebook is represented as a plurality of ebook pages associated with a plurality of segments. A navigation command is received from a user, the navigation command requesting a navigation graphical user interface (GUI) in a particular navigation mode of a plurality of navigation modes. One or more ebook pages, of the plurality of ebook pages, are identified for page thumbnail generation, and page thumbnails are generated for each of the identified one or more ebook pages. The generated page thumbnails are grouped by segment, using the plurality of segments. The navigation GUI is generated in the requested navigation mode using the grouped page thumbnails, the navigation GUI listing at least one segment, of the plurality of segments, and horizontally listing at least one page thumbnail associated with the at least one segment, and the navigation GUI is displayed.

Abstract: An ebook is represented as a plurality of ebook pages associated with a plurality of segments. A summary view command is received, the summary view command requesting a particular type of summary view of a plurality of available summary views. One or more ebook pages are identified, for a summary view based in part on the requested type of summary view, and page thumbnails are generated for each of the identified one or more ebook pages. The generated page thumbnails are grouped by segment, using the plurality of segments. A summary view graphical user interface (GUI) is generated for the requested type of summary view using the grouped page thumbnails, the summary view GUI vertically listing one or more segments, of the plurality of segments, and horizontally listing page thumbnails associated with the one or more segments, and the summary view GUI is displayed.