The Open Book Project: open-hardware e-ink eBook reader

The Open Book should be comprehensible: the reader should be able to look at it and understand, at least in broad strokes, how it works. Software support has made great strides; on the Arduino side, the Open Book IL0398 driver has waveforms for 2-bit grayscale mode and a "Quick" mode for turning pages, as well as initial support for partial refresh. Board support: CircuitPython board definition for Open Book. Software: minimum viable software for listing and selecting books as text files on SD card, reading a work... ...and storing the user's place in that work between reading sessions... Hardware: Migrate Open Book PCB to KiCad.! The eBook wing does less than the Open Book Feather, mainly because it's limited to using only the pins available via the Feather header. Initially the eBook Wing was intended to just validate the ideas going into the Open Book, but after building a few of the Open Book board, I think it has a place as its own thing. As of October 2020, more than 100 Open Book and E-Book FeatherWing PCBs have been shipped and are in the hands of makers, and several folks have posted photos of their completed builds! I know that Adafruit remains excited about the Take Flight with Feather run, but the ongoing COVID situation has left the timing of that in question.