The Amazon Kindle Paperwhite is our favorite e-reader, primarily because it's affordable (at just over $100), is easy-to-use, and offers access to Amazon's unparalleled book selection for the best prices. The Wi-Fi only version with ads is great on its own, but if you want to impress your giftee even more, the Wi-Fi plus 3G version will allow them to download books from anywhere without having to worry about finding a Wi-Fi connection.