My humble submission :
I came to 'closer- knowing' of Upanishads after my marraige (1960) when, my wife, with a Master degree and with three volumes of Upanishads , published by R.K.Mission --
(6Th .Edition,1976) by Swami Gombhiraanonda.
Though I was fully absorbed,then, in my professional life (Medicine ) , I used to leaf through the pages , sometimes, guided by her and, over time, was interested to know the meaning of life and the depth of Spirituality in Bharatya 'Darshan'.
After Retirement , I could devote more time in learning a bit more.- through reading the translated version of Upanishads ( including expositions on Ge eta by Swami Vivekananda, Sri Aurobindo, B.G .Tilak, and other great spiritual personalities).
Also , I attended with interest, some lectures of Swami Ranganathananda , while in Delhi and was inspired to study more about Spiritual Science from available sources.
Finally while in U.S.A. ,-I was presented a book -'The UPANISHADS' of Eknath Eswaran (Isbn. 10:0-915132-39-7 : 1987)by my daughter Neela.
The final out come was this Manuscript, written between 2004 and 2006, which can be summed up only as a 'Road Map' from a lay- man's poin of view .
Only variation is that -I have tried to present it in my own way with my poetic instinct(recognised) and admitting my own limitations and my egoistic boldnes as a 'Free-thinker' .
I have tried , in places, some trans-literation of both sanskrit and english words to inject my own understanding of the words and logo-s.
The readers are free to construct their own field of perception and opinion.
_______________________________