The alchemist is one of a few books that I can read and reread every year. When I travel I always take two copies; one to read and one to give away. There is something in Paulos Coelho’s writing that always helps me to gain perspecitve and direction in my life.
Other books that havent been mentioned; when things fall apart by Pema Chodron. And into the wild by Jon Krakauer
Some books that have been mentioned as well; the four agreements. Letters to a young poet; most thing by milan kundred.
I am sure there are many more that shaped me but those are the ones that come to mind without much thought.