An electronic book, also known as an e-book or eBook 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.The main reasons for people buying e-books online are possibly lower prices, increased comfort and a larger selection of titles.In the space that a comparably sized physical book takes up, an e-reader can contain thousands of e-books, limited only by its memory capacity. Depending on the device, an e-book may be readable in low light or even total darkness. Many e-readers have a built-in light source, can enlarge or change fonts, use
text-to-speech software to read the text aloud for visually impaired, elderly or
dyslexic people or just for convenience. Additionally, e-readers allow readers to look up words or find more information about the topic immediately using an online dictionary.