An ebook is an electronic copy of a book that can be downloaded to your computer. An ebook is a very convenient way to read and also store your information. This can be uploaded to your iphone, ipad or other digital readers. All you need is the free Adobe Reader which already comes installed on all newer computers. However, if you have an older computer and don't have Adobe Reader installed, it is a free download. Just go to http://www.adobe.com/products/acrobat/readstep2.html