Interactive Content for Digital Books

A method of presenting a glossary in a digital book, the method comprising:

• receiving user input selecting text corresponding to particular content displayed at a particular location within digital book;
• displaying, in response to receiving user input selecting text, an interactive glossary interface, the glossary interface including a plurality of glossary terms, each associated with the text shown in the particular content displayed at the particular location within the digital book;
• receiving, at the interactive glossary interface, user input identifying a particular one of the plurality of glossary terms at the particular location within the digital book;
• and
• displaying in the interactive glossary interface, in response to the obtaining user input identifying a particular one of the plurality of glossary terms, a glossary term definition of the particular one of the plurality of glossary terms and a list citing locations, other than the particular location, within the digital book where the particular one of the plurality of glossary terms is additionally recited within the digital book.

A system for presenting a glossary in a digital book, comprising:

• one or more processors;
• memory coupled to the one or more processors and configured for storing instructions, which, when executed by the one or more processors, performs operations comprising:
• receiving user input selecting text corresponding to particular content displayed at a particular location within a digital book;
• displaying, in response to receiving user input selecting text, an interactive glossary interface, the glossary interface including a plurality of glossary terms, each associated with the text shown in the particular content displayed at the particular location within the digital book;
• receiving, at the interactive glossary interface, user input identifying a particular one of the plurality of glossary terms at the particular location within the digital book;
• and
• displaying in the interactive glossary interface, in response to the obtaining user input identifying a particular one of the plurality of glossary terms, a glossary term definition of the particular one of the plurality of glossary terms and a list citing locations, other than the particular location, within the digital book where the particular one of the plurality of glossary terms is additionally recited within the digital book.

A program storage device, readable by a programmable control device, comprising instructions stored thereon for causing the programmable control device to perform operations comprising:

• receiving user input selecting text corresponding to particular content displayed at a particular location within a digital book;
• displaying, in response to receiving user input selecting text, an interactive glossary interface, the glossary interface including a plurality of glossary terms, each associated with the text shown in the particular content displayed at the particular location within the digital book;
• receiving, at the interactive glossary interface, user input identifying a particular one of the plurality of glossary terms at the particular location within the digital book;
• and
• displaying in the interactive glossary interface, in response to the obtaining user input identifying a particular one of the plurality of glossary terms, a glossary term definition of the particular one of the plurality of glossary terms and a list citing locations, other than the particular location, within the digital book where the particular one of the plurality of glossary terms is additionally recited within the digital book.