I read fiction on my phone all the time, but when I try to switch to my PC to continue reading, I will find myself doing something entirely different 15 minutes later. Yet, I can read for several hours in a row on my phone (I've even bought an extension cord so that I can charge my phone while reading).

I haven't tried reading from paper books for a decade though. Perhaps it would work, but the selection of things I'm interested in reading is too small.