I have an e-reader as well as a phone, tablet, and paper books and honestly I still prefer my phone over anything else. With my phone it’s easier to look up words/concepts I don’t know if I want more than a simple definition of the word. Sometimes I will use the e-reader with my phone next to me for when I want to look something up. These days I would say paper books are my least favorite medium though. Big, bulky, and it’s more work to read them in the dark.