I've read the book about men written by Osho, but what truly amazed me was Nisargadatta Maharaj. I highly recommend the book "I am that". It's an advaita vedanta masterpiece from a great spiritual teacher. There are other books wearing his name also, but "I am that" is the most famous which I read for three times until now. Glad to see the topic of human consciousness being discussed on steemit. It's not all about money after all...