Around 2013, author and cardiologist Sandeep Jauhar started noticing some worrying changes in his father. He would forget the code to their safe; he couldn’t remember what he did the day before and would get lost driving home. Eventually, his father was diagnosed with Alzheimer’s disease. In his new book, My Father’s Brain: Life in the Shadow of Alzheimer’s, Jauhar chronicles the challenges of caring for a sick parent and explains where medicine is today when it comes to treatment for this incurable illness.