Rationalism

Meditations of Marcus Aurelius

The Method, Meditations and Philosophy of Descartes

The Jefferson Bible

Six Metaphysical Meditations

Delphi Collected Works of Baruch Spinoza (Illustrated)

The Critique of Practical Reason

Meditations on First Philosophy & Other Metaphysical Writings

Naturalism and Religion

A Brief History of Modern Philosophy

Rules for the Direction of the Mind

Essays in Rationalism

From Rome to Rationalismor: Why I Left the Church

Letters to Eugenia; Or, A Preservative Against Religious Prejudices

An Apology for Atheism

Arrows of Freethought

Rationalism

A Logic of Facts; Or, Every-day Reasoning

On the Method of Zadig

Superstition In All Ages

Modern Rationalism