This is a profound and well-written study of a character type previously discussed by Horney. In pathological vindictiveness one is willing to sacrifice everything to attain revenge. The differences between sadism and vindictiveness, and the differences between the identifying child who becomes authoritarian and the lost child who becomes vindictive are discussed. Daniels emphasizes the passion for justice and the feeling of having been cheated. Horney had emphasized injured pride. This is mentioned without including mastery of the threat of loss of continence in the formation of pride. Paradise Lost, Moby Dick, and The Scarlet Letter are cited as examples from literature in which there is a vindictive hero. Technical problems, including countertransference in the analysis of the vindictive character, are delineated.