An electronic book, also known as an e-book or eBook. It is a book publication made available in digital form, consisting of text, images, or both, readable on the flat-panel display of computers or other electronic devices.
Although sometimes defined as “an electronic version of a printed book”,[some e-books exist without a printed equivalent. E-books can be read on dedicated e-reader devices.
But, also, on any computer device that features a controllable viewing screen, including desktop computers, laptops, tablets, and smartphones.