John Callahan has edited the manuscript, "Juneteenth," of a never before published book by Ralph Ellison who died in 1994. Ellison's first and only book released in 1952, "Invisible Man," won the National Book Award. Callahan was named Ellison's literary executor and is editor of "The Collected Essays of Ralph Ellison." Callahan is a professor of humanities at Lewis and Clark College in Portland, Oregon.