Susanna Mary Clarke (born 1 November 1959) is a British author best known for her debut novel Jonathan Strange & Mr Norrell (2004), a Hugo Award-winning alternate history. Clarke began Jonathan Strange in 1993 and worked on it during her spare time. For the next decade, she published short stories from the Strange universe, but it was not until 2003 that Bloomsbury bought her manuscript and began work on its publication. The novel became a bestseller.

At the dawn of the nineteenth century, two very different magicians emerge to change England's history. In the year 1806, with the Napoleonic Wars raging on land and sea, most people believe magic to be long dead in England--until the reclusive Mr Norrell reveals his powers, and becomes a celebrity overnight.

Soon, another practicing magician comes forth: the young, handsome, and daring Jonathan Strange. He becomes Norrell's student, and they join forces in the war against France. But Strange is increasingly drawn to the wildest, most perilous forms of magic, straining his partnership with Norrell, and putting at risk everything else he holds dear.