Amazon's Prime Day sale offers significant discounts on Kindle e-readers, providing an opportunity to read more while reducing screen time on phones. Engadget editors have tested and reviewed current Kindle models, and every model is currently on sale. The base model Kindle is available for $85 ($25 off with Prime). This sale presents a rare chance to purchase Kindles at reduced prices, as they are not frequently discounted. Check out Engadget's buying guide for ereaders to maximize your device.