At the age of thirty-six, on the verge of completing a decade’s worth of training as a neurosurgeon, Paul Kalanithi was diagnosed with stage IV lung cancer. One day he was a doctor making a living treating the dying, and the next he was a patient struggling to live. Just like that, the future he and his wife had imagined evaporated. When Breath Becomes Air, chronicles Kalanithi’s transformation from a naïve medical student “possessed,” as he wrote, “by the question of what, given that all organisms die, makes a virtuous and meaningful life” into a young neurosurgeon at Stanford, guiding patients toward a deeper understanding of death and illness, and finally into a patient and a new father to a baby girl, confronting his own mortality. What makes life worth living in the face of death? What do you do when the future, no longer a ladder toward your goals in life, flattens out into a perpetual present? What does it mean to have a child, to nurture a new life as another fades away? These are some of the questions Kalanithi wrestles with in this profoundly moving, exquisitely observed memoir.