Mary Shelley began a romantic relationship with Percy Bysshe Shelley after her mother died during her birth. While traveling through Europe with Percy, Mary had the idea for her novel "Frankenstein" during a stay in Switzerland. The novel tells the story of Victor Frankenstein creating a monster through an experiment with electricity. After suffering multiple tragedies including the deaths of children and Percy drowning, Mary returned to England and wrote "Frankenstein", publishing it anonymously in 1818.