The world is filled with variables that, despite our best efforts or our most scientific discoveries, manage to lead us down an unforeseen track. Why does one smoker die of lung cancer but another lives? The answer to this question and so many more is in ‘the hidden half’, in these variables which until they unfold are unpredictable. Stories ranging from the field of economics to genetics and business fill the pages of this new book, attempting to explain the fact that that which works in one instance may not in another. This book attempts to change the way readers view the world, by turning their understanding of odds and variables on its head.