In the example that is mentioned above. You wasted money because some of the books load volume need to be paid if compared to the book, you can read it anytime, anywhere, and how many times it is because you avoid having to worry about expenses.
In the example above. Make you waste money Because of this, some books. Obliged to Compared to the book You can read it anytime. And many times Because you do not have to worry about the cost.
From the example above makes you a waste of money, because to load some books, the need to pay, if compared with that book. You can read anywhere, anytime, and many times.