[SHELLEY, Mary Wollstonecraft] Frankenstein: Or, the Modern Prometheus, London: Henry Colburn and Richard Bentley, 1831, 8°, third edition, additional engraved title and frontispiece (some offsetting to engraved title, dampstain to inner margins of frontispiece and 2 titles, notes in ink affecting preface and text to p.27). [Lyles B4a] [bound with:] Charles Brockden BROWN. Edgar Huntly; or, the sleepwalker, London: Henry Colburn and Richard Bentley, 1831, 8°, 2 works in one volume, contemporary roan-backed marbled boards (extremities lightly rubbed).