Who is the author of the book of Joshua in the Old Testament?

The Old Testament book of Joshua was written to give an account of the events following the death of Moses and the Israelite crossing of the Jordan to the 'Promised Land'.

The book of Joshua is an immensely important for the life of all believers because it shows how a man whom never had any leadership experience, filled with fear, learned to trust in God wholehearted and how God revealed himself more and more to him.