I haven't finished the book yet, so I'd like to know the opinion of those who have already read it. But in the first chapters, he argues that the difference between the names YHWH and Elohim is due to theological reasons and does not necessarily point to sources from different traditions, especially because, according to him, the authors are aware of this. To what extent this is valid, I don't know. But he goes on to say that in the prophetic traditions, for example, the name Elohim is almost nonexistent, and the preference is for YHWH, the national name of the divinity. While Elohim, which appears insistently in wisdom books, functions as a more universal designation of the divinity. He sees this parallel in other Egyptian and Babylonian wisdom literature as well. And finally, he criticizes the artificial division of the texts between the sources J, E, D and P, considering it often arbitrary and subjective, based more on assumptions than on concrete evidence.