I haven't got a clue about the PW2, but I seem to recall another manufacturer had an eInk reader with night view option. Was it a Kobo or Nook? Or maybe I'm just senile, but I do seem to recall reading that. I hope the PW2 has it. I think it will work much better on an eInk screen than on an LCD screen due to less contrast. Funny, but with black text on white screen we need or want more contrast, but white text on a black screen works better with less contrast. For me anyway.