Device switching Some e-readers let techies read seamlessly from one device to the next.

Ergonomic design Prefer to turn the page with the push of a button rather than swiping? Consider a screen with physical controls that make it easy to whiz through e-books.

Many e-readers have adjustable shade and brightness.

Adjustable lights Nighttime readers may prefer a screen that can be adjusted from bright white to amber, while daytime bookworms might want something that’s easy on the eyes in sunlight.

In addition to considering the screen size, keep in mind the weight (most e-readers weigh five to seven ounces), the battery life and whether a travel cover is available. Portability Some readers prefer a large screen, while others want a compact tablet that travels easily.Screen E-reader screen sizes use the diagonal measurement of the display (not the height and width of the device itself), and they can range from six to upwards of 10 inches.Many e-readers also feature free cloud storage if you’re buying content from the manufacturer’s own online marketplace (say, Amazon, Barnes & Noble or Kobo). If you want to download and listen to audio books, consider 16 or 32GB of space. Storage Today’s e-readers can hold thousands of e-books, PDFs and other content formats, and devices typically start with 8GB of built-in storage.

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