William Horwood is an English novelist. His first novel, Duncton Wood, an allegorical tale about a community of moles, was published in 1980. It was followed by two sequels, forming The Duncton Chronicles, and also a second trilogy, The Book of Silence. William Horwood has also written two stand-alone novels intertwining the lives of humans and of eagles, The Stonor Eagles and Callanish, and The Wolves of Time duology. Skallagrigg, his 1987 novel about disability, love, and trust, was made into a BBC film in 1994. In addition, he has written a number of sequels to The Wind in the Willows by Kenneth Grahame.
In 2007, he collaborated with historian Helen Rappaport to produce Dark Hearts of Chicago, a historical mystery and thriller set in nineteenth-century Chicago. It was republished in 2008 as City of Dark Hearts with some significant revisions and cuts under the pen name James Conan.