Marsha's guest today is Mark Hertzburg.
Mark Hertzberg is the author and photographer of three books about Frank Lloyd Wright's work in Racine, Wisconsin. An award-winning photojournalist, Hertzberg was director of photography of The Journal Times in Racine until his retirement in March 2012. He serves on the board of directors of Wright in Wisconsin. He is the author of "Frank Lloyd Wright's Penwern: A Summer Estate."