No but:
PaPiRus - the ePaper Screen HAT for your Raspberry Pi
https://www.kickstarter.com/projects/pisupply/papirus-the-epaper-screen-hat-for-your-raspberry-p
(Which I backed)
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Wow⌠I was joking about âinstructions to build your own e-reader using a Rasberry Pi,â and that might soon be possible. I find buttons indispensible, so I am looking at some Android gaming tablets with joysticks and buttons, such as the JXD S7800B, as possible e-readers. I am also considering a second Iriver Story HD for when the first one finally stops working.
Buttons for what? The Kindle Voyage has buttons.
Buttons for not having to use the touchscreen. I have proprioceptive issues. I have tried using touchscreens, but havenât found touchscreen devices that let users disable complex gestures and easily-accidentally-triggered painful flashing zooming gestures.
Microsoft has instructions on how to disable some of these gestures in Windows 8 devices, but the required control panel options arenât available in the one Windows 8.1 device I have tried.
Kindles donât have complex gestures. They have touch and swipe. The Voyage has a haptic button on either side of the screen as well.
Okay. I havenât tried one of the new Kindles. I have tried a Nook, which went haywire and started zooming. I would also need to deal with file conversion and (re)organization.
Use Calibre.
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Then Iâd really need to deal with file conversion and reorganization. 
And Iâd still need to deal with incompatible files:
DJVU support is only for converting DJVU files that contain embedded text.
http://manual.calibre-ebook.com/faq.html#what-formats-does-app-support-conversion-to-from
(Between Calibre and iBooks, Iâve had enough of the e-book-library nonsense, and just want to use folders. Calibre was Calibre. iBooks used to keep users from changing titles, so we had to deal with the different title formats different uploaders to the Internet Archive, etc. used. iBooks eventually allowed us to change titles, but once we deleted one book, it would transfer the title, author info, etc. to another book, creating all sorts of trouble.)
Calibre just puts them in folders and has a database.
If youâre using djvu, you should just give up. Thatâs a dead format that no one new will support ever.
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When I tried Calibre, it stripped the titles from each file, and substituted its own gibberish [apparently derived from bad metadata]. And I need djvu. Some of my files are in djvu. Some of these arenât available in pdf, except by converting to pdf. It takes less space than pdf and djview doesnât crash as often as pdf readers do.
P.S. On that note, I just tried FBreader on my computer with some pdfs and epubs. It couldnât open the pdfs, and deleted the one epub, without even putting it in the trash. It was impossible to read the epub, because it kept scrolling, way too fast and way too sensitive. 
P.P.S. It doesnât look like thereâs any e-book-reader software that would work on my computer and on a tablet. So I need to continue to organize everything by folders, not reader-specific e-book libraries.
Calibre will rename the file to whatever title you give it or, if you download metadata, what you approve from the download. It goes into a directory structure though and you can easily back it all up.
Djvu is a dead format. No one adds support for it any more than they do for wordstar. Itâs dead and buried.
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Itâs quite superior to PDF in many ways. It makes smaller files. It is relatively popular in Russia. Not sure if Iâd call its demise so fast.
Edit: Also, the decoders/readers tend to behave quite faster than for PDF. How could that monstrosity win the format wars?
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Agree, and the strongly rumored 13" iPad will be even better! Canât wait,
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