The author is a theoretical physicist and an Anglican priest. He attempts to reconcile these views, as they often disagree in fundamental ways. For example, about the eventual death of the universe billions of years into the future, he says (p. 102) "there is every theological expectation that the last word does not lie with death but with the ultimate reality of God." So he proposes that the highly uncertain existence of God with his hugely implausible properties is superior to well-established science. This shows that he, like most believers, prefers religious "truth" to actual truth.
The whole book is like that. He quotes the Bible because he thinks that highly defective book somehow contains universal truth. For example he takes the Gospels at face value, and the Exodus as well. The Exodus never happened, and the Gospels make much more sense if they are viewed as a religious tract rather than history.
He discusses his view that God is without a time dimension, although many theologians do not agree. He does not say how a timeless entity would cause things to happen in temporal sequence. There are many more examples of Christian "thinking." (Most theologians prefer the "eternal" property to the timeless one, but eternity is impossible to prove. As someone said, "Prediction is difficult, especially about the future."
In summary, the book has far too many unanswered questions and unjustified assumptions. He should have stuck to physics, where there is at least a possibility of establishing fact rather than just repeating typical Christian opinion. The best thing about this book is that it is only 134 pages.