My now-vision-challenged mother-in-law will be 92 late this month and has probably read every large-print book that exists. She dearly wants to reread Michener's books, but they do not seem to be available in large print. (Audiobooks are not a consideration.) We are thinking of buying her a Kindle or Nook or ebook reader of some kind for her birthday and need to find one that's very user friendly plus can change the print to a larger font size. Any suggestions?