Being unsubscribed to any faith but being very interesting in the parallels between most, I found this book very interesting, especially so because the author chose to focus on leading (and sometimes controversial) thinkers in the four areas of christianity, judaism, islam and orthodox hindu.
The author takes the parallels he finds between these four faiths and attempts to construct a trinitarian view of God. I often found it amusing that he tries to rubbish the influence of classical thought (especially the Platonists and Aristoteleans) yet constructs an intriguing Trinitarian Creationist God not too far from the 'pagan' One/Good of Plato, Plotinus, or even, for that matter, the reasonably orthodox Trinitarian christian God of S T Coleridge.