One of the most faithful followers of Edmund Husserl's phenomenology and phenomenological philosophy, Ludwig Landgrebe is equally known for his own contributions to these fields. What characterizes Landgrebe's work is his combination of philosophical issues and arguments with the precise delimitation of principles (or essential structures) whose rejection involves a contradiction. For example, he maintains that if one negates awareness, one nevertheless presupposes an awareness of this negation. (Landgrebe prefers the term "awareness" to "consciousness" due to the many traditional meanings associated with the latter.) As an assistant to Husserl, Landgrebe edited a number of Husserl's texts, including the classic Experience and Judgment. As a professor of philosophy at the university of Cologne, he formed a following of phenomenologists among whom are such notables as Klaus Held, Ulrich Klaesges, and Donn Welton. Landgrebe attracted students and audiences by his vast scholarship and personal modesty...