Although Louis Sullivan (1856-1924) has long been associated with the American transcendentalist movement of Emerson, Thoreau, and Whitman, this is the first book to analyze his transcendetalist thought with the development of his architectural style. It also explores sources of and influences on his thought that have not been considered before. With the help of Narciso G. Menocal’s new work, both scholars and students of architectural and art history, as well as American cultural and intellectual history, will gain new insights into Sullivan and his work.