I canīt stand pbooks anymore

I have one or two English pbooks in my shelf that I havenīt read so far, but the font size of those US paperbacks is terribly small. I would probably have to switch on all the lights in the house to read it comfortably. Problem number 2: no lookup-mode in pbooks, so you need the pbook AND the dictionary on the sofa.
I also prefer to read German books as ebooks. Reading on a Cybook is just more comfortable, kids do not accidentally use it as painting book etc.