In the Introduction, Steane states briefly the argument of his book: "Science is a rich tapestry which does not at all suggest that the world is a purposeless machine, but nor does it replace the arts and humanities. We respond to our situation through all our powers of expression, including forms of giving in which our very identity is shared and allowed to be shaped in return." A few pages later, he sums up the book in six points. The first is the following: "The structure of the natural world is such that high-level principles describe and constrain what can be supported by low-level dynamics." At the end of the Introduction, he distinguishes three parts of the book: "Part I of the book, Chapter 2-9, presents the structure of what happens in various parts of scientific study, and hence what this tells us about the nature of the physical world.... Part II of the book, Chapters 10-17, looks at what science cannot do, and how discussion of values and of religious ideas operates....Part III, Chapters 18-22, presents, in a positive way, an outlook which tires to do justice to all the various themes. The aim is to show how certain mainstream religious ideas can inhabit this picture without awkwardness."
It is a good book and worth reading. It does not try to give an airtight argument, but rather argues for an element of choice about some basic principles. And the author illustrates his ideas with many interesting quotations and examples. The tone of the book is popular rather than scholarly, but it is well-thought out and argued. It could be read by mature high school students.