65 yo? Go for an e-book reader rather than a tablet, Kindle has different versions, some with both wi-fi and 3G and others with wi-fi only.
I use my tablet to read e-books, but the e-readers have better screens, designed for longer reading; my tablet also has a battery that doesn't last too long, while most good readers (I think) have batteries that don't need recharging every hour or two
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