Was Frankenstein actually written by Percy not Mary Shelley?

No, "Frankenstein" was written by Mary Shelley, who published the novel in 1818. While her husband, Percy Bysshe Shelley, provided some editorial feedback and support, the core ideas and narrative were entirely Mary's. The notion that Percy wrote the novel is a misconception, likely stemming from his prominent literary reputation and their collaborative relationship. Mary Shelley is recognized as the author and is credited with pioneering Science Fiction through her innovative storytelling.