This book is similar to the author's last book "Finding meaning in the second half of life", with some updates on Author's insight on aging. It is very unsettling to read this book (be warned). Change and growth is not easy. One needs to acknowledge one has lived a life that is someone else' blueprint. But in the end, like butterfly coming out of racoon, it's liberating. It might be very upsetting to people in your relationships who cannot understand you. But you are liberated.
I wish the author can provide more step-by-step guide on how to find the true calling, as I'm still trying to figure it out. Perhaps that true calling is forever changing, and one has to embrace the change.
