Barnes & Noble has released the NOOK GlowLight 4, a 6-inch eReader that costs US$149.99. The NOOK GlowLight 4 has an adjustable colour temperature display, 32 GB of storage and a USB Type-C port.
https://www.notebookcheck.net/NOOK-GlowLight-4-eReader-arrives-for-US-149-99-with-an-adjustable-colour-temperature-display.583843.0.html