An e-book or eBook is also known as electronic book, digital book and e-edition. It is a book length publication which contains text of text, images, or both, and produced on Published through, and readable on computers or other electronic device. An e-book is in digital form. E- book can also be defined as an electronic version of a printed book, but e-books can and do exist without any printed equivalent. E-books are usually read on dedicated e-book readers or tablets using e-reader applications. Personal computer and many smart phones can also be used to read e- books. It is very simple and easy to purchase and download e-book through the internet. It is exactly like purchasing any other product. As e-book formats emerged and proliferated, some garnered support from major software companies such as Adobe with its PDF format, and others supported by independent and open-source programmers