In the 1996 volume discussed here (it won a Pulitzer Prize for biography), Miles explains his project like this:
His text is the Tanakh, the Jewish ordering of the books that Christians call the Old Testament. The different orders of both these canons were set several centuries into the Common Era (C.E.) -- that's what we called A.D. until the Christian solipsism of that naming came to seem unsupportable. (Here's a pretty clear article on the two differing arrangements of the books; I don't know enough to say what axes may be being ground within it.)
Perhaps in part because I read this book by ear while running and walking, I got off to a bumpy start with God. This is not how we are accustomed to read the Bible, something I have considerable exposure to by way of the extensive lectionary of my church. It took awhile, listening to Miles' exposition, to hear into his description of God's developing character.
As the book wore on, I found myself able to listen into Miles' story of the deity. I won't say I came away sure I'd heard a "correct" interpretation; rather, I'd absorbed an epic poem about a multifaceted character. I could swim along in it and this was a delight.
In an interview about his more recent opus, Miles gave a clue about how we might approach this strange and wonderful volume: