Michael Cassidy met Stephen Neill during the Nairobi Mission in 1968/9 and was invited to join him for three months sabbatical study in 1971. Michael enjoyed two other similar sabbatical times with Stephen at Durban Westville University and Wycliffe Hall in Oxford when he was lecturing there. Stephen was a theologian, ecumenical scholar and prolific author who helped Michael with philosophical apologetics and to better understand ecumenical/evangelical dynamics, differences and dialogue.
- A history of Christian missions (The Penguin History of the Church)
- Colonialism and Christian missions
- The supremacy of Jesus
- A genuinely human existence
- Christian faith and other faiths