- Aims of Phenomenology: The Motives, Methods, and Impact of Husserl's Thought
- Phenomenology and Existence: Toward a Philosophy within Nature
- Naturalism & Subjectivism
- The Foundation of Phenomenology: Edmund Husserl and the Quest for a Rigorous Science of Philosophy
- The Search for an Alternative: Philosophical Perspectives of Subjectivism and Marxism












