Following the success of Mary Shelley’s Novels and Selected Works there was some regret that Mary Shelley’s remaining writing remained unpublished. In particular, this includes her lyric poetry and her writing for Lardner’s Cabinet Cyclopaedia of Biography as well as some material that has only recently been positively attributed to her. This can now be rectified with this four volume set that is edited to the same standard as the earlier edition. Publication of this material will allow libraries to complete the canon of Mary Shelley’s work at a time when her literary reputation and interest in her continues to grow.