Kathopanishadp: Story of Nachiketas
Yama as good teacher. What happens hereafter? Perseverance of Nachiketas to know the "truth".
Kathopanishad tells the story of Nachiketas introduced in this piece.
Found interesting. Upanishads have no religion or geographical bias. Can be considered similar to modern research papers trying to understand better different aspects of the same subject.
M G Warrier