When it comes to an eBook reader, the choices are limited. The market is dominated by Amazon’s proprietary Kindle along with a few other options like Kobo, Nook and Onyx.
An interesting news for open source enthusiasts is that a developer, Joey Castillo, is working on creating an open
It said it’s a 120mhz SAMD51 ARM Cortex-M4.
There’s a version with the pi pico https://github.com/joeycastillo/The-Open-Book