Kazuo Ishiguro's 1988 novel "The Remains of the Day" is an instant favorite of mine. In the book, Ishiguro explores concepts such as duty, vocational passion, and love. It is a powerfully sad story.
Having read the book, I have noticed a marked decrease in how connected I feel to my work. Work and the idea of loving your work now feel ontologically bad. For anyone who considers themselves to love their work, this novel is a must-read.