In Mark Cohen's mystery The Fractal Murders the detective, Pepper Keane, reads Being and Time when he gets the chance. When his friend Jeff, a pilot, offers him a ride on corporate jet to Boston, so that he can interview a witness, he sits on the floor of the cockpit reading.

    For any man, "Dasein," in the world, Heidegger felt there are three possible modes of existence: undifferentiated, inauthentic, and authentic. A man in the undifferentiated mode never questions the meaning of his own life or faces up to the fact that his existence is defined by the culture fate threw him into. He never recognizes his own "thrown-ness," but blindly accepts the existence he has inherited. If anything, I had questioned the meaning of my life way too f*cking much, so the undifferentiated mode clearly did not describe me.
    A man in the inauthentic mode recognizes that his existence is a result of coincidence-recognizes his own thrown-ness, but simply substitutes some other role for the life he inherited, not recognizing that both roles were created by the culture he was thrown into. I had left the Marine Corps for civilian life, and I had left the congestion of Denver for mountain life in Nederland, but I recognized that both roles existed within the American culture I'd been been born into. I knew that if I'd been born in China, I'd have turned out to be a thick-limbed Chinese private eye, so I definitely recognized my own thrown-ness, and the inauthentic mode didn't describe me either.
    A man's recognition of his own thrown-ness sometimes leads to what Heidegger called "anxiety." He begins to think about death. When a man is unable to face up to the possibility of his own nonbeing or nothingness, Heidegger referred to this as "fallen-ness." Instead of dealing with his anxiety, the man who experiences fallen-ness returns to the inauthentic mode.
    But some who experience anxiety do face up to their own thrown-ness and their own death, and in so doing they accept responsibility for their own lives. Heidegger called this "care." In caring for the world, each man makes the most of his own possibilities-even if those possibilities were originally dictated by the culture he was thrown into. A man who adopts this attitude lives in what Heidegger called an "authentic mode of existence."
    I closed the book and put it down. Then I remembered the dream I'd had in Walla Walla. And I think I understood it. Joy hadn't been shouting, "Dozen"; she'd been shouting, "Dasein." The image of me falling to earth indicated a state of fallen-ness. I had changed my outer life, and I was happier, but I still hadn't found a way to deal with with death or the fear that there is no God and life is meaningless. And Joy had been carrying a CARE package. Had she been trying to tell me how to pull myself out of my state of fallen-ness?
    "You're awful quiet," Jeff said. "Whatcha thinking about?"
    "Falling," I said.

Sadly, in the next mystery in the series, Pepper has stopped reading philosophy.  ¶ 7:19 AM