Quarto (8″ x 10-1/4″) bound in original white cloth. A biography of his teacher, Louis H. Sullivan, along with Wright’s views on the evolution of modern architecture. Illustrated with reproductions of 39 previously unpublished drawings given to Wright by Sullivan just before his death in 1924. This copy boldly SIGNED on the front endpaper by the author and dated 8 June 1949, Wright’s 80th birthday and perhaps the date of publication. Light wear to spine. Near Fine, lacking the uncommon dustwrapper.