Ron Hornbaker came up the idea for what is now known as BookCrossing in March 2001. About four weeks later, on April 17, he started the website, which has grown all over the world. By April 2003 the website had over 113,000 members, and in 2004 the "Concise Oxford Dictionary" included the word "bookcrossing". In the same year, BookCrossing was featured as a part of a storyline in the Australian soap opera "Neighbours". As of 30 September 2009, Bookcrossing.com had over 814,000 members, with over 5,800,000 registered books.