Amazon's Kindle Paperwhite Signature Edition returns to a record low of $135

Amazon's Kindle Paperwhite Signature Edition is the best e-reader for the money bar none, and you can now pick one up at the lowest price we've seen. It's back on sale at its Prime Day price of $135, for a savings of $55 (29 percent). Amazon has also knocked 29 percent off the regular Kindle Paperwhite and Kindle Oasis devices, so if you're in the market for an e-reader, it's a great time to pick one up.

Buy Amazon Kindle devices at Amazon

The Paperwhite Signature Edition scored an exemplary 97 in our Engadget review thanks to a number of nice features. With smaller bezels, it has a big and responsive 6.8-inch E Ink touchscreen, with gentle backlights you can turn on and off or adjust to suit your reading conditions. It offers USB-C and wireless charging (with up to 10 weeks of reading on a single charge), 32GB of storage, waterproof reading, automatic brightness and warm light options. The only complaint we had was the $190 price, but it's an easy decision at the $135 sale price.

If you don't need quite that much storage, the regular Kindle Paperwhite is also on sale with 8GB of memory ($100, or $40 off) and 16GB ($105, or $45 off). You get most of the features of the Signature Edition, like the warm light, 10 weeks of battery life and waterproof reading, though it lacks the wireless charging and extra storage.

Also on sale is the Kindle Oasis, available at $200 for the 32GB model instead of the regular $280 price. We called it "the perfect e-reader for the 1 percent" in our review because although it's insanely thin and light and comes with a charging case, $280 is quite expensive. The sale goes a fair way to mitigating that problem by knocking $80 or 29 percent off the price, making it a far more affordable indulgence.

Follow @EngadgetDeals on Twitter and subscribe to the Engadget Deals newsletter for the latest tech deals and buying advice.