In 1816, at just 18 years old, Mary Shelley awoke from a nightmarish dream that inspired her famous novel, Frankenstein. But while her story pleasantly spooked literary friends, it was far beyond the tastes of Mary’s time. So where did Mary draw the themes for her monster tale? And how did Frankenstein break through the harsh critics, make it onto the silver screen, and become the iconic green monster we know and love?