URL for the crowdfunding: https://www.crowdsupply.com/oddly-specific-objects/open-book-touch

Specs:

• Display: 4.26" e-paper touchscreen, 480 × 800 px, warm + cool frontlight
• Processor: ESP32-S3 dual-core, Wi-Fi + Bluetooth LE
• Memory: 16 MB flash, 8 MB PSRAM
• Formats: EPUB and plain text, no DRM
• Storage: microSD card slot
• Interface: USB-C with integrated LiPo charging
• Dimension: 78 × 120 × 10 mm, about 85 g
• Open source: MIT-licensed firmware, open hardware (to be released at shipping)

It also has a replaceable 800 mAh battery, I found it cool :)