Amazon has quietly upgraded its two most affordable models of Kindle e-readers. And right now, Prime members can save up to $40 by purchasing one of these feature-rich devices. Don’t have Prime? New subscribers can sign up for a free one-month trial.

There really is a difference between reading a book on a phone or tablet and reading on a Kindle. It’s easier on the eyes, and you don’t have to deal with glare or screen brightness issues. And with prices like these, now is a great time to experience the difference for yourself.

Kindle Paperwhite is $40 Off with Prime