The KLF (also known as the Justified Ancients of Mu Mu, the JAMs, the Timelords and other names) are a British electronic band formed in London in 1987. Bill Drummond (alias King Boy D) and Jimmy Cauty (alias Rockman Rock) began by releasing hip hop-inspired and sample-heavy records as the JAMs. As the Timelords, they recorded the British number-one single "Doctorin' the Tardis," and documented the process of making a hit record in a book "The Manual (How to Have a Number One the Easy Way)". As the KLF, Drummond and Cauty pioneered stadium house (rave music with a pop-rock production and sampled crowd noise) and ambient house. The KLF released a series of international hits on their own KLF Communications record label and became the biggest selling singles act in the world in 1991.