Recently reading The last days of Richard III as an e-book allowed me to explore some of the features provided when using an e-book reader - in this case a Sony e-book reader.
Each time you open the book on the e-book reader it opens at the large page you were last reading.
Using the button in the right hand corner of the reader provides further navigation options including going to the Table of Contents or typing the number of a required page in the box provided.
Tapping a heading in the Table of Contents takes you to specific chapters and sections such as appendices, bibliography, index, notes and selection of plates.
This non-fiction book had many foot-notes for each chapter providing additional information and sources. Tapping the highlighted number for each foot-note takes the reader to the additional information. Utilising the back arrow at the bottom of the Notes page return the reader to the section they were previously reading.
Pressing the button to the right of the Home button also takes the reader back to the section they were originally reading.
These options help the reader easily navigate their way around the variety of information features provided in the book.