Amazon Kindle Voyage and Barnes & Noble NOOK GlowLight are two good reading tablets. CNet features both devices in its list of best e-book readers of 2015.
With a 6-inch display that displays 300 pixels per inch, the Kindle Voyage offers 4 gigabytes of internal storage and supports AZW, PDF, TXT and DOCX formats. The device weights 180 grams and does not require a computer to download books. It charges in three hours when connected to a computer through USB.
The NOOK GlowLight by Barnes & Noble features a 6-inch screen that runs at a resolution of 58 by 1024 pixels. The book reader has 4 gigabytes of internal storage Wi-Fi capability. Weighing 175 grams, the device can open EPUB, PDF, PNG and JPG files.