The book's now out, and I still have trouble with the whole idea; it seems like elevating CSL to the status of Holy Writ. The 'St. C.S.' movement was bad enough, but this just feels disturbing on a whole 'nother level. However, I've recently been thinking of picking up 'The Archeology Bible' as a follow-up to the Old Testament audiobook, so maybe I can adjust my expectations enough to come to terms with the idea. So far, it's not proving easy.
In any case, here's a link from the publisher with more information about the book -- note that to their credit they allow one poster to opine that 'Lewis himself wd have been absolutely horrified' without deleting the comment.
And here's another link showing some sample pages, so you can get a better idea how the Lewis material is integrated into the biblical text:
I gather from some passing comments that Douglas Gresham, Lewis's younger stepson, wrote an introduction to this book and that a distinguished list of Lewis scholars contributed to making the selections, but haven't yet seen a copy to confirm this and haven't been able to find that list online.