This Credit Card-Sized Ebook Is on Sale for 15% Off As Part of Amazon’s October Prime Day Sale.
Prime Day is usually a great time to score a Kindle deal, but ahead of Amazon’s “Prime Big Deal Days” event on October 6-7 , I’d like to shift your attention to a completely different category of e-readers. Tiny e-ink devices—I’m talking credit card-sized, with screens around 4 inches—are all the rage in 2026, and if you, too, see the appeal of carrying all your books on a device so small you’ll forget you even have it in your pocket, now’s the time to get started: one of the best options on the market, the recently released Xteink X4 Classic , is on sale for 15% off ahead of the big sale.
Xteink is a Chinese startup that made a splash in the e-reader world last year with the release of the X4 , a minimally featured device that made up for its lack of functionality and usability with a low price (under $70). Since then, a huge online community of fans has formed around the device, sharing tips on Reddit and even teaming up to create an alternative operating system that addresses many of the early issues . Soon after the X4, Xteink released a number of other devices, including the even more compact X3 and the X4 Pro , which adds a backlight and a touchscreen (at the cost of reduced image clarity and two physical buttons).
Earlier this month, the X4 Classic was released, replacing the original X4 and featuring a number of usability improvements, including a longer-lasting battery, relocated page-turn buttons, a real-time clock, USB storage support, and tilt-based page-turning. The X4 Classic is also 6g lighter and a millimeter thinner than the X4, though there’s a tradeoff: the latter replaces the USB-C charging port with magnetic contact connectors, which require a separate cable or adapter.
These upgrades have also increased the price: the X4 Classic retails for $89, $20 more than the discontinued X4 and just $10 less than the X4 Pro . But right now, Amazon has dropped the Classic’s price by 15% to $75.99—its lowest price ever—ahead of the Prime Big Deal Days sale. It’s a good option for those who value crisp, easy-to-read text over the convenience of a built-in backlight or a touchscreen, as the latter adds extra layers between the inner screen and the outer glass. And if you understand what you’re getting into, these devices only support ebooks without copy protection (DRM) , meaning you won’t be able to use them to read your existing Kindle library.