Erik (The Phantom of the Opera) other adaptations such as films, television shows, books, and musicals. One such popular literary adaptation is the Susan Kay novel "Phantom" (1990), a fictional in-depth story of Erik from the time of his birth to the end of his life at the Paris Opera House. For the most part, Kay's novel stays in context with Erik's life history as laid down by Leroux, however Kay (as explained in her Author's Note) changes and shapes the character to match her own vision, influenced by other adaptations besides the original. In addition, the ending/resolution is quite different from Leroux's. The story follows
The Phantom of the Opera (1986 musical) and Canadian productions. The recording of the 1986 original London cast, released by Polydor Records in 1987, was released in both a single CD "Highlights From The Phantom of the Opera" and a two CD "Phantom of the Opera", both of which have been certified 4× Platinum in the US and sold 4.97 million copies as of January 2017. "The Complete Recordings" edition has sold 507,000 copies since 1991. "Phantom" was also certified 3× Platinum in the UK. The Canadian cast recording went 2× Platinum in Canada. In Switzerland, "Phantom" was certified 3× Platinum and "Highlights" was certified 2× Platinum.