Why use an ereader to read a book?
Using an electronic reader over a book has many advantages. You have immediate access to large libraries of books. You can purchase and start reading a new book in minutes. You can also take your entire library with you when you travel without lugging around many or large books. E-readers also give the ability to read in the dark without using other lighting that may disturb those around you.

While tablets have many of these same benefits, the experience on ereaders is better for reading books. The screens cause much less eye strain due to the use of electron inc on many of the devices. They are also free from notifications and other distractions found on tablets and smartphones.