Keep the free one, sell the others just below market price (say, 104$). Then, buy more 4th-free-books. Again, keep the free ones etc etc ad nauseam. You are going to be so rich! So much so, you can buy X, and on a whim call it Twitter, just because you will be filthy rich and can afford such futility!
Keep the free one, sell the others just below market price (say, 104$). Then, buy more 4th-free-books. Again, keep the free ones etc etc ad nauseam. You are going to be so rich! So much so, you can buy X, and on a whim call it Twitter, just because you will be filthy rich and can afford such futility!