I'm very amazed by e-ink. And I'm totally making this open sourced solar powered ebook thing happening this weekend hell yeah.
Okay! right now I managed to create a config file that is read by the main code, so basically it reads different pages from a book being the pages sliced txt files in a folder. Iḿ very proud on how is it going! points 1 and 2 are done. Next is to set up the next/last page config and the menu! https://git.sr.ht/~alienagain/RPIebook
I went a little further, almost done! right now I can: choose a book and read its pages until the end, go back and forward while reading the book, split a larger text into several pages.
Todo:
cron the hell out of it so I don't need the extra screen and save a number page log.
Okay! already added a pages log :)
A quick description of what I did in spanish here! https://elbinario.net/2022/07/10/un-ebook-simple-de-fin-de-semana/
@alien great idea! would love to see what you make
@alien it would be great to find you in the subway reading with this device! 
@alien I know it's not your style, but a few years ago I got a BQ Cervantes 4 which is open source and although the business closed the code is [here](https://github.com/bq/cervantes) and you can flash the unlocked firmware with [this](https://www.mobileread.com/forums/showpost.php?p=3762198&postcount=5) which is pretty nice, it was more expensive than a kindle but you get what you pay for
@agony ooh I used to have one of those it just stopped working. Are they still being sold? Wow
@alien nah they're not, they went bankrupt like 2 years ago but you can still get 2nd hand at a decent price, and I saw some in wallapop for like 10-15€ with a broken screen being sold for spare parts so there's also some degree of repairability (?)
@alien You could check out The Open Book project: https://github.com/joeycastillo/The-Open-Book
There is a lot of hardware documentation written on the board itself and adapting the software to other screen sizes is probably not too difficult.
@drisc I did investigate it in the past! I even bought the same screen before, but it turned out more complicated than what I was aimed to build. I enjoy doing things that I can dismantle and change quickly. I'm trying my own simpler version. Thank you though! it's an amazing project.
@alien It'll be cool to see what you build!
Okay I already managed this to read a text from a folder and display it in a couple of seconds. I will open a repo asap but #todos right now:
*Cut a longer text into slices of text to parse them in the ebook.
*Show page number. (slice number)
*Set an organized menu.
My idea is to make it similar to an old phone registry: 1 to 4 books to choose from a keyboard and read them.