Diana Wynne Jones was a British novelist, poet, academic, literary critic, and short story writer. She principally wrote fantasy and speculative fiction novels for children and young adults. Although usually described as fantasy, some of her work also incorporates science fiction themes and elements of realism. Jones's work often explores themes of time travel and parallel or multiple universes. Some of her better-known works are the Chrestomanci series, the Dalemark series, the three Moving Castle novels, Dark Lord of Derkholm, and The Tough Guide to Fantasyland.

Joanne Rowling ; born 31 July 1965), known by her pen name J. K. Rowling, is a British author and philanthropist. She wrote Harry Potter, a seven-volume fantasy series published from 1997 to 2007. The series has sold over 600 million copies, been translated into 84 languages, and spawned a global media franchise including films and video games. The Casual Vacancy (2012) was her first novel for adults. She writes Cormoran Strike, an ongoing crime fiction series, under the alias Robert Galbraith.