Over 50+ rare books on natural philosophy and metaphysics are included in this app!

Epictetus:
The Enchiridion
The Discourses

Plato:
The Complete Dialogues of Plato
- Cratylus
- Charmides, or Temperance
- Critias
- Crito
- Euthydemus
- Euthyphro
- Gorgias
- Ion
- Laches, or Courage
- Laws
- Lysis, or Friendship
- Meno
- Parmenides
- Phaedo
- Phaedrus
- Philebus
- Protagoras
- The Republic
- The Seventh Letter
- Sophist
- Statesman
- Symposium
- Theaetetus
- Timaeus

Thomas Aquinas:
Summa Theologica

Rene Descartes:
Rightly Conducting the Reason, and Seeking Truth in the Sciences
Meditations on First Philosophy

Thomas Hobbes:
Leviathan

David Hume:
Of Superstition and Enthusiasm
Of the Delicacy of Taste and Passion
Of the Liberty of the Press
Of Essay Writing
Of the Rise and Progress of the Arts and Sciences
An Enquiry Concerning Human Understanding
A Letter from a Gentleman
Essays on Suicide and the Immortality of the Soul
The Natural History of Religion
Of Tragedy
Of the Standard of Taste
My Own Life
Dialogues Concerning Natural Religion

Immanuel Kant:
The Critique of Judgement
The Critique of Practical Reason
The Critique of Pure Reason
Fundamental Principles of the Metaphysic of Morals
Introduction to the Metaphysic of Morals
The Metaphysical Elements of Ethics
Prolegomena to Any Future Metaphysics
The Science of Right

Gottfried Wilhelm Leibniz:
The Monadology

John Stuart Mill:
On Liberty
Representative Government
Utilitarianism
The Subjection of Women

Friedrich Nietzsche:
Thus Spake Zarathustra

Blaise Pascal:
The Provincial Letters
Pensees

Spinoza:
Ethics
Theologico-Political Treatise
On the Improvement of Understanding

Henry David Thoreau:
A Plea for Captain John Brown
Slavery in Massachusetts
Life Without Principle
Civil Disobedience
Walden, or Life in the Woods