Forty Verses on Reality by Ramana Maharshi with Comments: Ulladu Narpadu, A synopsis of Ramana Maharshi’s teaching with comments and practice notes (Ramana Maharshi Commentaries)

I've been a student of Ramana's since 1962 and have read many of his books including these 40 verses. However, this book has new titles for the verses with detailed explanations of theory and practice not found elsewhere. I would say this is the best book on his teachings.