For bulk orders of Hostile Witnesses: How the Historic Enemies of the Church Prove Christianity, contact Catholic Answers Press at http://catholicanswerspress.com/
For bulk orders of Gary's other books (Why Catholic Bibles Are Bigger, How to Wolf-proof Your Kids, The Case for the Deuterocanon, Making Sense of Mary, The Gospel According to McCarthy) please contact via email at gary@handsonapologetics.com.
All bulk orders from Nikaria Press (5 copies or more of the same title) are available to book sellers at the standard trade discount of 40% plus shipping.
Thank you for your interest!