The book is a concise introduction to Sri Ramana Maharshi's thought, compiled from his various writings. It's made pretty clear that Sri Ramana often contradicted himself (in his teachings) if only because he tailored his advice to the level of understanding of the listener. Perhaps he was also trying to take account of the fact that each of us creates our own reality?
At any rate, I found the book frustrating, partly because it uses a lot of Indian/buddhist terms I'm not familiar with, but also because I object to the conclusion that bliss/nirvana is our ideal/natural state so that the problems/issues of "ordinary" life hardly need thinking about. As a result, I browsed through the book rather than reading it from A to Z.
Nevertheless, I've rated the book 5-star because I concluded "there's gold in them there hills", ie a great deal of wisdom even though no mention of currently fashionable buzzwords such as non-locality or quantum theory. I believe Sri Ramana when he says there is no time, space or cause and effect in "the real world". I believe him when he says that we are all one, that is the individual is not separate. Indeed separation is an illusion.