Aesthetics
The branch of philosophy that studies beauty and artistic taste. It focuses on the origin and status of aesthetic judgments.

Ethics
The branch of philosophy concerned with the evaluation of human action and values.

General
Works that deal with general philosophic topics.

History
Works that examine historical philosophers and their ideas.

Metaphysics and Epistemology
Metaphysics studies the nature of being and existence in the most general terms and epistemology studies the nature and justification of knowledge.

Political Philosophy
The branch of philosophy that studies the institutions and processes of governing.