Pastor McShaffrey was invited to deliver the final two lectures at an apologetics conference sponsored by Zion United Reformed Church in Sheffield, Ontario on May 7-8, 2010.
His lectures on the Cults and the Occult are posted below and lectures from previous speakers on various topics (e.g., Apologetics, Evangelism, Darwinism, Atheism, Secularism, Judaism, Islam, and Hinduism) can be found at this link.