I only just started reading e-books a few months ago. I bought myself a tablet and got all excited, downloading my favourite books from the internet. However, I noticed that my eyes get quite sore from looking at the screen for too long. After about half an hour I already notice the strain despite of playing around with the various adjustments of text size and background. Currently I am using the Aldiko Reader for Android, which I find quite pleasant and well organised. What kind of e-reader do you use?