We have learnt that there is safety in numbers. Our understanding of the world around us has grown with our appreciation of its habits and repetitions. We live in a world of consequences rather than coincidences. This understanding of the way the world is founded upon our discovery of the power and utility of number in unravelling its innermost workings. From the farthest reaches of space to the inner space of elementary particles of matter we have found the world to dance to a mathematical tune. This book takes a philosophical look at mathematics, and asks whether it is just a human invention, a discovery, part of the mind of God, or a game played on paper with any rules we like. It should be of interest to physicists, philosophers of science, and general readers.