Reddit reviews Zero: The Biography of a Dangerous Idea

Everyone here thinks you're crazy (and maybe they aren't wrong), but indeed these kinds of issues have been thought about and discussed for millenia, by the Babylonians, Mayans, Greeks, Medieval Europeans, Indians, Arabs, Renaissance Europeans, and more. You might like to read Zero: The Biography of a Dangerous Idea (and the references contained in it) for more.

You might want to look into this book. It is a really quick but interesting history of the concept of zero and why it was so controversial.