RS is a repository of (unofficial) dharma e-books.
They were created using markdown/pandoc/calibre and uploaded on this GitHub page.
Below you will find a list with links to the relevant GitHub repositories.
There, you can download these e-books in epub/mobi/azw3 (and some of them in pdf) and read them on your e-book (preferably e-ink) device.
All Books by John Wheeler (re-distribution of “hard to find” material)
Sayadaw U Tejaniya (Burmese Theravada)
4 Ways to Do Nothing (silent illumination/shikantaza/pristine mind/do nothing)
Mahasi Vipassana (Burmese Theravada)
Note: If you want to know more about pragmatic dharma, you can visit this link.