Big Ideas Simply Explained is a 75-book series with 75 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, Shulamit Ambalu, Paul Kelly, Paul Kelly, Sam Atkinson, Paul Ruditis, Paul J. Ruditis, John Farndon, Danny Leigh, Louis Baxter, Kieran Grant, Damon Wise, James Canton, DK, Shanna Hogan, and Various.