Novelist Walter Mosley has written dozens of popular mystery and crime novels, but none quite like The Last Days of Ptolemy Grey, in which a man with Alzheimer's must solve a mystery buried deep in his own fading memory. In this episode, Mosley tells Kitty how caring for his parents with dementia exposed him to the drama of caregiving and later informed his writing. His novel, recently adapted into an Apple TV series starring Samuel L. Jackson, stands out as a rare portrayal in media of the experience of Alzheimer's disease, while still delivering a thrilling crime story.