'"Un Dieu defini est un Dieu fini." A God defined is a God annihilated.' So opens this book of essays giving an insight into a unique perspective on the concept of God. The author does not attempt to define 'God' but rather, he defines the limits of how we use the word 'God'. In the process he examines the mysteries of God's nature and our relationship with the Supreme Spirit, ranging from 'What God Cannot Do' through 'God-Man, Man-God', 'God's Body', 'God and Science', 'What is God?' to 'God is Not Dead'. Halliday's book points us in a direction which is expansive and challenging, while leaving us to decide for ourselves what it is we choose or prefer to believe.