Life and Matter

A Criticism of Professor Haeckel's "Riddle of the Universe"

The Seekers

Ludicrous Aspects Of Christianity

A Response To The Challenge Of The Bishop Of Manchester

Meditations on the Essence of Christianity, and on the Religious Questions of the Day.

Meditations on the Actual State of Christianity, and on the Attacks Which Are Now Being Made Upon It.

An Outline of the History of Christian Thought Since Kant

Philosophy and Religion

Six Lectures Delivered at Cambridge

A Theological-Political Treatise [Part III]

A Theological-Political Treatise [Part IV]

The System of Nature, or, the Laws of the Moral and Physical World. Volume 2

The Consolation of Philosophy

Theologico-Political Treatise — Part 2

The Theological Tractates and The Consolation of Philosophy

First Principles

The System of Nature, or, the Laws of the Moral and Physical World. Volume 1

On the Improvement of the Understanding