The functional chassis of all real spirituality are metaphysical statements, often called views. Each view is a way of understanding reality. Every view in real spirituality is connected with a “way”. The way is the path to being that view.
The “I am awareness” view is that of chunks of Hinduism, especially Vedanta and its various offshoots. The best book written from this perspective is “I Am That”, which I recommend highly. A good one, especially the forty percent or so is “The Essence of Enlightenment” by James Swartz.
The “I am awareness argument” is that the only thing which always exists is awareness, and therefor that is what we are. We are not our bodies, or even our consciousness: both can be absent and awareness still exists.