Remember the old days when browsing a bookshop meant tilting your head at shelves? We saw only the spines, each with a title, shade of colour and the author's name.
Choosing a novel from spines means some dismay as the book you pull out may have little appeal, and so you are forced to put it back and move your eyes further along the shelf. And then joy when you find the novel that you are taking home.
Today, that kind of bookshelf browsing feels like hard work compared to sweeping your eyes ac...
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