The KLF (also known as The Justified Ancients of Mu Mu, furthermore known as The JAMs, The Timelords and other names) were a British acid house band of the late 1980s and early 1990s. Beginning in 1987, Bill Drummond (alias King Boy D) and Jimmy Cauty (alias Rockman Rock) released hip hop-inspired and sample-heavy records as The Justified Ancients of Mu Mu, and on one occasion (the British number one hit single "Doctorin' the Tardis") as The Timelords. 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 for 1991. The duo also published a book, The Manual (How to Have a Number One the Easy Way), and worked on a road movie called The White Room.