Original: Her diary, published as the anonymous blog Belle de Jour: Diary of a London Call Girl became increasingly popular, as speculation surrounded the identity of Belle de Jour, and whether the diary was real.
Simplified: Belle de Jour is said to be the pen name of a former London call girl. Under this name she maintains a successful blog, Belle de Jour: diary of a London call girl which by 2003 had been selected by The Guardian as its blog of the year and has had two books published in both the UK and US