In his introduction to this special collection of prayers, Bishop Julian Porteous of Sydney shows that all sins give the devil a chance and that although he is a defeated enemy, there are many ways in which he can gain a damaging foothold in people's lives. This booklet draws on the Church's vast treasury, bringing together prayers for deliverance, St Patrick's breastplate, the prayers of Pope Leo XIII, and many others. It offers a real weapon for the spiritual battle we are all called to fight.