sentences:  The psychologist Frank Sulloway described the book as an "impressively erudite if also much-disputed" work.He credited Ellenberger with doing "more than any other student of Freud's life" to question false claims about Freud's achievements.The psychoanalyst Joel Kovel described the book as "useful because of its encyclopaedic nature", but nevertheless concluded that it has "little critical value or real historical analysis."