Sri Atmananda, a.k.a. Krishna Menon (1883 to 1959) lived in Kerala, South India in the same era as Ramana Maharshi and Nisargadatta Maharaj. His teachings are aimed at establishing oneself in non-dual awareness, although he is much less well known than Ramana or Nisargadatta. Some individuals resonate more quickly with Atmananda's teachings because of his simple logic and intuitive concepts well suited to a modern Westerner. Atmananda had some well known students such as John Levy, Jean Klein, Wolter Keers, and Paul Brunton.

At Wikipedia:  Atmananda_Krishna_Menon

His writing is clear, concise and immediate as can be seen from the following sample of this work.

Atma's Disappointment

I. I created thoughts, feelings, perceptions and the rest as a means whereby I could make Myself known.

II. Yet people don't look at Me but cling to the objects of their thoughts and feelings. How then is their bondage to end?

III. Taking away the objects, I created deep-sleep state; it was also meant to make Myself known.

IV. There being no thought or feeling nor anything else to be seen in that state, they blindly began to see nothingness in it.

V. Whether objects are present or absent, I am always there without change.

VI. My position is just in front of the eyes. It is in and through Me that all men see, yet they don't see Me. This is most surprising.

VII. If a man always insists on closing his eyes when he faces Me, how can he see Me?