If you can believe it, there's a third literary power couple in the Godwin/Shelley line. Though not related to the previous couples, Robert and Elizabeth Barrett Browning's famous love story was sparked over their mutual admiration for the work of Mary Wollstonecraft, and Percy and Mary Shelley. They kept their courtship a secret from Elizabeth's disapproving father, and moved to Italy after he disinherited her. Their wild and enduring love is now immortalized by Elizabeth's sonnet, "How Do I Love Thee?" which is cringe-inducingly sweet. Get a room, guys!