Hi Allan,
On Sunday, 2020-08-16 11:46:27 +0200, Allan Francis Lowe wrote:
I am looking for a e-reader.
PocketBook, Tolino or Kobo (my personal gut order of preference).
If possible with may be with some reinstallable OS
What for? Anyway, PocketBook and Kobo devices usually run a Linux custom kernel and BusyBox. Tolino runs Android (at least on newer devices?). The Kobo hacking community might be largest.
You'll find many threads for those three (and more) in https://www.mobileread.com/forums/forumdisplay.php?f=50
Eike