~ 2 stars ~
It was overall...okay. At times quite enjoyable, there's definitely lots and lots of advice throughout this that would have been very useful had I unfortunately not already been familiar with most of them. Especially given that the book covers quite a wide area of potential life changes and improvement. Overall I did find it to be a bit of a slog to get through, I'm afraid. Granted, this might be because large sections were very dated, citing events from the 70s and 80s, and in terms of ecology/environmentalism/climate change/the meat industry/reducing waste and overconsumption, nothing has changed at all since the 90s, so all the content were things I'd heard over and over and over growing up. The affirmations and examples from personal experience were a worthwhile addition up til about page 100, then became quite sappy and repetitive, but I did find a few quotes I enjoyed that I've underlined here and there so I can go back to them. It had useful advice, exercises, and affirmations, but it gets very pseudo-science-y in Chapters 10, 11 and 12 (Chakras, energy healing, yin/yang/female/male energy, Carl Jung, on top of the studies listed dating from pre-1990, since that's when the book was written). Lots of Carl Jung in this and even Freud. It was also a little new age-y for my tastes (mention of people's "energies" and deriving lessons from the laws of physics, plus the stuff mentioned above). I don't really trust the author in terms of both knowledge of taoism in its original cultural context and culture, and in terms of the veracity of scientific claims. Especially since she created her own "translations" of the Tao Te Ching despite not (as far as I can tell) having any fluency in the original language. I did enjoy the very last chapter on Taoist Politics though.
(FYI: the version I read was not "The Tao of Inner Peace", as I see other reviews on here are for that book, it was "The Tao of Peace, A Guide to Inner and Outer Peace", with a white, orange, blue and green cover with a yin/yang symbol).