No black American was so widely honored in his lifetime; yet segregationists denounced Martin Luther King Jr. as a Communist and worse, FBI Director J. Edgar Hoover once publicly branded him a liar, and militant blacks eventually came to see him as a "sellout" to the white Establishment. Now a black writer has added yet another—and unlikely—epithet to those fastened on the assassinated leader. In a new book, The King God Didn't Save (Coward-McCann, Inc.; $5.95), Novelist John Williams (Night Song, The Man Who Cried I Am) calls King a failure.
Full of frustration and seething black anger, Williams' book...