Amanda Haywood (1997-2001), Jenny Baran (1999-2003), Amanda Ward (2001-2005), Tony Goguen (1994-1998), Peter Quaglia (1999-2003), Miroslav Ragus (2000-2004)
Since being picked up by Vintage Books in March - the novels were originally published by Sydney's Amanda Haywood - the Fifty Shades trilogy has sold 31 million print and digital books in 41 countries, 20 million in the US.