@archicastor1 Juan and beagle lady
I found a shortened version of Denis' book on line, but did not find the section cited, however the issue is clear.
First of all, it does not say God created the universe ex nihilo in the Bible. That is an interpretation that theologians have made down through the ages. It is implied, I would and many others would say, but not stated. On the other hand just because something is not clearly explicit in the the Bible, does not mean that it is not true.
Second, Genesis says that the initial form of the "world" was formless, void, the deep, and without light. The watery deep was a Hebrew metaphor for Chaos, not a worldly ocean, therefore one cannot say that God just rearranged somethings to convert Chaos into order. In a true sense Chaos is Nothing. Order is something.
It is Light which represents energy that begins to produce order. If God gave order to the chaotic world that God did not create, then Who created that matter? No one could but God.
The Big Bang theory clarifies this. The first step of creation was the creation of the singularity, which IS chaotic, because it has no energy. God created energy to make the Big Bang and give the universe form and matter/energy, time and space.
To understand life and reality we need to how the Bible and Science interpret each other. This is an important point which Denis Lamoureaux make in this interesting book.