1. За электронную кингу
1. You can take not only one book, there your can save about ten books.
2. It very comfortable to read something in dark, for example under your blanket.
3. It save your money thus you dun't buy ten books, you simply download it in your e-book
2. За обычную книгу.
1. You can read some stories or poems in original.
2. You haven't to charge this one.
3. It can't broke.