Awareness by Anthony De Mello
I haven't been the same, in the best way possible, ever since reading it.
Anthony was well-read and traveled and his background as an Indian, Jesuit Priest and practicing psychologist put him at the perfect intersection of experience to deliver such a life-changing work that encompasses religion, science, relationships, your psyche, career, money, philosophy, spirituality, etc.
It's telling and (to me) validating of his mastery of life that, after his death, he was excommunicated from the church due to his 'blasphemous' works.
The ebook and audiobook are available for free here: https://archive.org/details/Awareness-AnthonyDeMello