One day I will sit my grandchild on my knee and tell them tales of days of old. He will look at me with amazed expression as I explain how we used a book to navigate around London. Without fear of blackspot, low battery warnings or software crashes, we could walk for hours with our eyes turned down and many exciting things to look at. Mostly we tried to work out where the hell we were.
Perhaps the current trend for disposing of technology will lead to a rebirth of the humble A-to-Z.