While I was surfing the internet for opportunities to increase my flow of income, I came across a great concept. It was an idea I was never aware of before, but was happy that I found. The concept of an e-Book, or electronic book was what I had discovered. It is a book that can be purchased and downloaded to ones computer instantly. When purchasing a traditional book, there is a risk of it not being in stock. If this is the case, one would have to wait much longer. There is no waiting for shipping after the purchase of an e-Book because it is simply a digital file that is transferred in the form of a PDF document or other medium. This is a huge advantage because you are saving time and money on postage, printing costs and other materials needed to ship out a product to your customers. You are also saving space in your home because other tangible products would need to be stored. An e-Book can be published literally within a few days or even hours. E-Books bring Web-like interactivity to the reading experience. Clicking directly on the electronic page allows you to look up the meanings of unfamiliar words, explore cross-referenced passages in the same book or related works, or even activates links to Web sites or multimedia elements such as sound, video, and animation. E-Books can be secured so only you or other authorized users can read and/or amend them. It is also possible to prevent unauthorized printing, copying or extraction of the content whilst still making the e-Book universally viewable and easily shared. They can be updated easily and more often so that the information is always current. This is a great aspect because we are in the information age and information that was at one point cutting edge could be obsolete within a matter of months. If in the end one would rather read off paper instead of a computer, e- Books can always be printed!