Mens World Book Day Costumes are ideal for school teachers and adults looking to take part in the fancy dress frienzy of World Book Day! Step into the tea party dressed as the crazy and flamboyant Mad Hatter, or stir that sweet chocolate as the world famous fictional chocolatier, Willy Wonka! Getting lost and can't keep up? You'll be a little easier to spot dressed in our adult Where's Wally costume. Whichever men's Book Day costume you choose, make sure you dress in style with our popular themes and characters.