Dr. Eugene Gendlin is known for his development of Experiential Therapy and for his work on Focusing.
The Gendlin Online Library, a part of the Focusing Institute site, has an excellent collection of documents about focusing to read and download.
"The articles are grouped by theme and within each theme there are further groupings to guide the user. The most substantial sections of the library are the Philosophy of the Implicit and Focusing-Oriented Psychotherapy thematic groups." - Gendlin Online Library