What is an ebook

According to the highly regarded tome named The Oxford Companion to the Book, printed by Oxford University Press:

“An electronic book (also e-book, ebook, digital book) is a text- and image-based publication in digital form produced on, published by, and readable on computers or other digital devices.

E-books are presented visually or aurally, with the *audio book as a precursor to, and limited exemplum of, electronic publishing's potential.

Components other than text have been considered enhancements, including multimedia (sound, images, film/video/animated graphics).

The e-book is a young medium and its definition is a work in progress, emerging from the history of the print book and evolving technology.

In this context it is less useful to consider the book as object—particularly as commercial object—than to view it as cultural practice, with the e-book as one manifestation of this practice.”