Big Ideas Simply Explained is a 73-book series with 73 released primary works first released in 1998 with contributions by D.K. Publishing, R.G. Grant, Will Buckingham, Peter Singer, Peter J. King, Douglas Burnham, Clive Hill, John Marenbon, Marcus Weeks, Nigel C. Benson, Joanna Ginsburg, Voula Grand, Merrin Lazyan, Catherine Collin, Antón Corriente, Niall Kishtainy, Paul Kelly, Paul Kelly, Shulamit Ambalu, Sam Atkinson, James Canton, Paul J. Ruditis, Danny Leigh, Paul Ruditis, John Farndon, Louis Baxter, Kieran Grant, Damon Wise, DK, Shanna Hogan, and Various.