Graphic designers are the masked superheroes of the design world. They shape the way people interact with everyday objects, often at a subconscious level, and create identities for events, services and businesses. Michael Bierut, with his familiar designs for Saks 5th Avenue, New York City parking signs, Verizon, Billboard, and most recently, Hillary Clinton’s much talked-about campaign logo, is a prime example of a man looking out for public aesthetic good. Now, with the release of his book, "How To use graphic design to sell things, explain things, make things look better, make people laugh, make people cry, and (every once in a while) change the world," and a retrospective exhibition of his works coming to a close this weekend at the School of Visual Arts, Bierut’s mask has been lifted.