Neverwhere is the companion novelisation written by English author Neil Gaiman of the television serial Neverwhere, written by Gaiman and devised by Lenny Henry. The plot and characters are exactly the same as in the series, with the exception that the novel form allowed Gaiman to expand and elaborate on certain elements of the story and restore changes made in the televised version from his original plans. Most notable is the appearance of the Floating Market at Harrods rather than under Battersea power station. This is because the management of Harrods changed their minds about proposed filming. The novel was originally released by BBC Books in 1996, three episodes into the television series run. It was accompanied by a spoken word CD and cassette release, also by the BBC.

Neil Richard MacKinnon Gaiman is an English author of short fiction, novels, comic books, graphic novels, audio theatre, and screenplays. His works include the comic book series The Sandman and the novels Good Omens, Stardust, Anansi Boys, American Gods, Coraline, and The Graveyard Book. He co-created the TV series adaptions of Good Omens and The Sandman.