DO NOT MISTAKE Lynne Tillman’s Mothercare: On Obligation, Love, Death, and Ambivalence for a memoir. While it is unflinching, this book isn’t primarily about the vexed origins or aftereffects of the fraught mother-daughter relationship it describes (although all of that is in here). Rather, it is about performing the duty of keeping a person safe in an age when medicine often prolongs our lives long past our capacities.