Kobo makes the best linux-based readers, but they're somewhat more expensive (I have a Libra 2 and a Sage, my only complaint is lack of a good web browser). Ony

Kobo makes the best linux-based readers, but they're somewhat more expensive (I have a Libra 2 and a Sage, my only complaint is lack of a good web browser). Onyx Boox has some nice android readers (I have a Poke 3 that I took everywhere until dropping it one too many times killed the screen), and they are generally slightly cheaper in comparable hw classes to Kobo.