Vagaries of Value: Basic Issues in Value Theory

Epistemology: An Introduction to the Theory of Knowledge

Reality and Its Appearance

Reality and Its Appearance

Autobiography

Philosophical Deliberations

Dialectics: A Controversy-Oriented Approach to the Theory of Knowledge

Process Metaphysics: An Introduction to Process Philosophy

Humanistic Philosophizing: Sensibility and Speculation in Philosophical Inquiry

Free Will: A Philosophical Reappraisal

Infinite Regress: The Theory and History of Varieties of Change

Predicting the Future: An Introduction to the Theory of Forecasting

G.W. Leibniz's Monadology

Epistemic Pragmatism and Other Studies in the Theory of Knowledge

Understanding Reality: Metaphysics in Epistemological Perspective

Quantitative Studies in Philosophy

Epistemetrics

Ethical Idealism