on the Sony Reader is actually enough and positive rightly been said worden.Was not mention its usefulness is the english lernen.Ich've downloaded several English texts and stories on the Internet and with Calibre (install carefully!) brought to the reader. While I had previously always annoying scroll in dictionary, I type now 2x on unfamiliar word and 2-3 sec. later I have the translation! It could not be any more. Absolute buy recommendation.