I had joined ethics online batch of Eden IAS in Oct 2020. Tirthankar Roy Chowdhary Sir covered the whole syllabus at time and explained the concepts from scratch using moral thinkers and examples. He is one of the best teachers whom I have met. The way he teaches is great. He has examples for everything. The institute provided 3 booklets namely theory book, 70 thinkers 70 thought and case study booklet which covers 100 case studies. I think this is one of the best institutes for preparation.