Sheena Vasani writes about tech news, reviews gadgets, and helps readers save money by highlighting deals and product recommendations for The Verge . If you like to read by the pool or at the beach, the 2021 Kindle Paperwhite remains one of the best e-readers available despite its age. That’s because, unlike Amazon’s latest entry-level Kindle , the last-gen Paperwhite is waterproof. And now through June 14th (or while supplies last), it’s on sale at Woot with ads, 16GB of storage, and a 90-day Woot warranty for $99.99, which is $40 off its original price. Despite being a few years old, Amazon’s last-gen Paperwhite offers nearly all the features that make the current model our favorite e-reader for those who primarily read Kindle books. It features a sharp 300ppi display and an adjustable warm front light, which makes reading at night more comfortable. Battery life is also excellent, often allowing you to eke out months of use on a single charge before you need to top it off via USB-C.…