Paul Kalanithi

When Breath Becomes Air is a memoir by Paul Kalanithi, a neurosurgeon who was diagnosed with stage IV lung cancer at the age of 36. The book is a reflection on his life and his search for meaning in the face of death. Kalanithi writes about his experiences as a doctor and a patient, and his struggle to come to terms with his mortality. He also explores the themes of mortality, purpose, and identity, and asks what makes life worth living.