This book Atma Bodha or knowledge of Self (Atma) is an outcome of deep thinking about why we are born and living, influencing or getting influenced by every one around us, developing relations with them both physically and mentally, worrying for them and either losing them or leaving them temporarily due to life cycle and permanently by death. According to Bhagavatgeeta and Upanishads it is due to this Birth - Death Cycle.
General talks on Atmabodha (Kannada) by V Subrahmanian
Conversations on Vedanta by Bede Clifford
Chapter 18 - Bhagavad Gita by Karanam Aravinda Rao
Ashtadhyayi by Sri NCT Acharya
Part 2 - Learn Sanskrit