The Jewel That Was Ours is a crime novel by Colin Dexter, the ninth novel in Inspector Morse series. This novel was written by Dexter after he wrote a screenplay for an episode titled The Wolvercote Tongue in series 2 of the television programme Inspector Morse.

Norman Colin Dexter was an English crime writer known for his Inspector Morse series of novels, which were written between 1975 and 1999 and adapted as an ITV television series, Inspector Morse, from 1987 to 2000. His characters have spawned a sequel series, Lewis, from 2006 to 2015, and a prequel series, Endeavour, from 2012 to 2023.