Letters to disciples in which Sri Aurobindo explains his teaching and method of spiritual practice and deals with problems that confront the seeker.
The Supramental Evolution
Integral Yoga and Other Paths
Religion, Morality, Idealism and Yoga
Reason, Science and Yoga
Planes and Parts of the Being
The Divine and the Hostile Powers
The Purpose of Avatarhood
Fate and Free-Will, Karma and Heredity, etc.