Who wrote Alice in Wonderland and why is he important to math?

Alice's Adventures in Wonderland was written by Lewis Carroll, whose real name was Charles Lutwidge Dodgson.

Charles Dodgson was a lecturer in mathematics at Oxford University.

He does not have an especially remarkable reputation as a mathematician. It is not considered that he made any great contribution to the field of mathematics and he is perceived as being rather conservative in his thinking. He did however, invent what is now known as the Carroll Diagram or Lewis Carroll Square, which is a means of categorising and displaying information. (see related link, below)