Cole, Phyllis, Mary Moody Emerson and the Origins of Transcendentalism: A Family History, Oxford University Press, 1998.

Mary Moody Emerson, an aunt of Ralph Waldo Emerson, was a writer herself and ne of the early adherents of American transcendentalism. This work examines Emerson's influences on her nephew.

Porte, Joel, and Saundra Morris, eds., The Cambridge Companion to Ralph Waldo Emerson, Cambridge University Press, 1999.

Intended to provide a critical introduction to Emerson's work, The Cambridge Companion to Ralph Waldo Emerson includes new interpretations of Emerson's work. In addition to commissioned essays, the work includes a comprehensive chronology and bibliography.

Richardson, Robert D., Jr., Emerson: The Mind on Fire, University of California Press, 1995.

This biography gives a historical perspective on Emerson and his work. It provides inspiring details on Emerson's thoughts and on the societal and political forces shaping the United States in the 1800s.

Versluis, Arthur, American Transcendentalism...