The Kindle Paperwhite is the best overall ebook reader, as it’s easy to use, has a great screen, and gives access to the enormous Kindle bookstore.
The Kobo Libra Colour is the best non-Amazon alternative, with a color screen, EPUB support, and reduced lockscreen ads.
The base Kindle is the best cheap option, with a sharp display and improved lighting, making it good for kids.
The Kobo Elipsa 2E is the best ebook reader for taking notes, with a large, stylus-enabled screen that gives you more than enough storage.
Other notable mentions include the color Kindle Colorsoft, the Kobo Clara Color, the Nook Glowlight 4 Plus, the Onyx Boox Go 10.3, and the Boox Pama 2.