Known as America's Agatha Christie, leading female crime novelist Mignon Eberhart cowrote this faithful adaptation of her popular novel While the Patient Slept.Known as America's Agatha Christie, leading female crime novelist Mignon Eberhart cowrote this faithful adaptation of her popular novel While the Patient Slept.Known as America's Agatha Christie, leading female crime novelist Mignon Eberhart cowrote this faithful adaptation of her popular novel While the Patient Slept.