Dr Jekyll, a physician conscious of the duality in his nature, and fascinated by the idea of the advantage that would arise if these elements could be clothed in different personalities, discovers a drug by means of which he can create a separate personality that absorbs all his evil instincts.
The duality of Scottish life - the mercantile, "respectable" lowland Scot, as represented by David Balfour, and the romantic, rebellious highlander, Alan Breck Stewart - each feature in this book. The novel is detailed in extensive notes, with a Scots glossary to supplement Stevenson's own glosses.
This title is part of an inexpensive range of classics in the "Penguin Popular Classics" series.