Like so many of us, award-winning writer Katy Butler always assumed her aging parents would experience healthy, active retire­ments before dying peacefully at home. Then her father suffered a stroke that left him incapable of easily finishing a sentence or showering without assistance. Her mother was thrust into full-time caregiving, and Katy became one of the 24 mil­lion Americans who help care for aging parents. In an effort to correct a minor and non–life threatening heart arrhythmia, doctors outfitted her father with a pacemaker. The device kept his heart beating but did nothing to prevent his slide into dementia, incontinence, near-muteness, and misery. After several years, he asked his wife for help, telling her, “I am living too long.”

Mother and daughter faced a series of wrench­ing moral questions: When does death cease being a curse and become a blessing? Where is the line between saving life and prolonging a dying? When is the right time to say to a doctor, “Let my loved one go”?

When doctors refused to disable the pace­maker, sentencing her father to a protracted and agonizing death, Katy set out to understand why. Her quest had barely begun when her mother faced her own illness, rebelled against her doctors, refused open-heart surgery, and instead met death head-on. Knocking on Heaven’s Door ($25.00), a revolution­ary blend of memoir and investigative reporting, is the fruit of the Butler family’s journey.