> My understanding is that the books you "buy" are licensed only to a single device Amazon allows you to read a book on up to six Kindles (or Kindle compatibl

> My understanding is that the books you "buy" are licensed only to a single device Amazon allows you to read a book on up to six Kindles (or Kindle compatible devices such as iPhones / iPads). It can be a bit fiddly (the easiest thing would be for you and your girlfriend to share a single account) but it's doable.