How to turn a tablet into an e-reader: The best settings and accessories

In a world full of endless specialty devices, do you really need one more thing? For readers, the answer is often yes. E-readers like Kindles and Kobos are devices that bridge the gap between a physical book and a tablet. They're extremely portable, hold thousands of books at once, and are gentle on the eyes. But what if you already have a tablet?

Tablets and e-readers aren't exactly the same — you can do a lot more on a tablet — but both let you read digital books. I've read dozens of books...