The Oxford Companion to Music is a music reference book in the series of Oxford Companions produced by the Oxford University Press. It was originally conceived and written by Percy Scholes and published in 1938. Since then, it has undergone two distinct rewritings: one by Denis Arnold, in 1983, and the latest edition by Alison Latham in 2002. It is "arguably the most successful book on music ever produced" (Wright, p. 99).