1. E-reader has a lot of books inside, while usual book has only 1 tale, or few stories 2.You need to charge e-reader, usual book doesn't need it 3. There is unusual feeling when you are reading paper book, while with e-reader - not 4. E-reader is smaller and more effective 5. You can trade your books with others, but not an e-reader P.S e-reader - электронная книга
Electronic books can be easely transfered and there is no problems with storing them. Some readers able to speak the book so you will be free from reading it - just listening. There is no need to visit library while searching the book. Two minutes and you get the book you want. But most disadvantages of these books are their unmaterial world.
2.You need to charge e-reader, usual book doesn't need it
3. There is unusual feeling when you are reading paper book, while with e-reader - not
4. E-reader is smaller and more effective
5. You can trade your books with others, but not an e-reader
P.S e-reader - электронная книга