I have never been able to read e-books as well as paper books.
An electronic book is made available in digital form
Right, however, I think they are not as easy to read as hard copies.
i prefer real books because it hurts my eyes to read ebook 
Exactly! I also seem to lose interest in them faster.
E-book
An electronic book, also known as an e-book or eBook, is a book publication made available in digital form, consisting of text, images, or both, readable on the flat-panel display of computers or other electronic devices. Although sometimes defined as "an electronic version of a printed book", some e-books exist without a printed equivalent. E-books can be read on dedicated e-reader devices, but also on any computer device that features a controllable viewing screen
about Earth and the way we conduct ourselves. Thus I think of my books as being about us, no matter how outlandish the scenario." The novel met with such critical success that some felt he would not be able to equal it. However, "Master of Paxwax" and its sequel, "Fall of the Families", have become classics of New Zealand literature. Both books have been recorded in 15-minute episodes read by Dick Weir. They are regularly broadcast on Radio New Zealand. CDs of these recordings are