This article says that the e-readers are not the reason off-line book stores are closing. Many people are still prefer to read paper books. People just buy books from on-line stores due to the cheaper prices and convenience of shopping. E-readers are much easier to carry around. You can carry around more than 100 books with no problem only if you have your laptop or start phone. Also, when you want to read a certain book, you can just download it from the internet. When people own a certain product physically, psychological ownership affect people's perception.