Most people know that, in 1066, William the Conqueror (not at that point so named) won the Battle of Hastings and became king of England. When it comes to the likely readership of this book, that ‘most’ must rise to ‘all’. If there is anyone reading this book who didn’t already know that, I would love to hear from you because you are genuinely reading in a genre that was previously of no interest. You, if you exist, and I bet you don’t, are an absolute confounder of the algorithms. It would be like someone reading a biography of Elvis Presley who did not already know that he was a singer. What
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