In my comment. I agree that the book will be used because it has a good message. The first e-book portable Can be considered to go anywhere because it is thin and light? The second message, easy to maintain
In My Opinion I agreed to the book because it has many advantages. First, eBooks and portable. Some phones can go anywhere and light. Second, keep it simple
In my opinion, I agree to use letter because there are advantages. First e-book portability can hold anywhere because of thin and light. Second, maintain easily.