Originally Posted by HarryT
Perhaps it might be easier to ask which readers DON'T have landscape mode. I don't think that any of the ones that I own don't have it.
That would be about right.
Pretty much every reader I've had going to the original rocketbook and PDAs allowed landscape reading.
Now, *multi-column* landscape (which I prefer) is a bit rarer though not unheard of, even on eink readers.