The term e-book  is a conjunction of the words "electronic book,” and refers to the text of a book which made available digitally, usually downloaded, and accessed through a device such as a computer, a smartphone or, popularly, a portable, dedicated e-book reader.E-books are just like any other book, without the paper.E-books are for everyone. You can get sports e-books, home business, cooking, fitness, business, marketing, how-tos, resource, society, culture and the list goes on. Some are already in different languages. E-books are very affordable to. Some come with a feature to where you can upgrade them or get a new version for free. Have a hard time seeing, just enlarge the text or zoom in. If you were a space alien there would be an e-book for you. 

There are many kinds of books such as: non-fiction, science -fiction, fantasy, adventure, mystery, spy, novels, books of poetry and many others

inform 

The books are still so popular because they are - very ancient media- very personal- less dangerous for your health- full of useful information, adventures and joy