Is there a need for a dedicated e-book reader now that many use tablets and phones to read ebooks? Amazon thinks so as it has introduced it's most advanced Kindle yet, the Kindle Oasis. Hailed by many as the best e-reader ever, the Oasis has months, yes months of battery life, and a thinner and lighter ergonomic design all for a hefty price of $389 for the model with free 3G wireless and $289 for the Wi-Fi model.