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)

Meditations on First Philosophy & Other Metaphysical Writings

Naturalism and Religion

Rules for the Direction of the Mind

Essays in Rationalism

An Apology for Atheism

Arrows of Freethought

On the Method of Zadig

Superstition In All Ages

Modern Rationalism

Meditations on First Philosophy

The Gods

Rationalism

A Logic of Facts; Or, Every-day Reasoning

Why I Do Not Believe in God

On the Improvement of the Understanding