Another possible item for the survival bag:
http://www.dailymail.co.uk/sciencet...ival--twin-screen-tablet-opens-like-book.html
That's the dumbest thing I've seen in a lontime! 2 small screens - you can only read one at any one time so why not just 1 small screen with a protective cover? (It's a bit different with "real" books as printing on both sides make sense).