What is your library access like? If your library is a member of the American Theological Library Association, you can try looking at the ATLA Religion Index that they should have on hand. It is published annually and always includes a large section on where to find book reviews. (You just look up the author and book title, and it tells you where to find any review of that book that was published that year.)
I just checked the publication date on the book you’re asking about and realized this may not help you. Since the book just came out this year and the 2008 ATLA Index wouldn’t be out yet, you won’t find it in the index yet. Ordinarily, you look at the year a book was released and search the ATLA index for that year and for the several years that follow (for good measure).
I know that CUF’s
Lay Witness magazine has book reviews in each issue, but it doesn’t appear that they have reviewed this particular book yet (in my cursory glance at the book reviews section for each issue in 2008).
Another option would be to try calling the publisher of the book (Ignatius Press) directly and asking them if the book has been reviewed. One would think they might be aware if one of their books has been reviewed. But, then again, they publish a lot of books, so it might be too much for them to keep track of.
Sorry! I seem to be offering you nothing but dead ends!
Edit: I thought of another option.
First Things also includes book reviews in each issue. If you look at the archives for each issue, you can see the book reviews section. Be aware that the titles and authors listed are the titles and authors of the
review itself, not of the book being reviewed. Thus, you would need to click on each link individually to actually see what book is being reviewed.
Also, you might try looking at journals and magazines from Sept. or Oct. of this year. With the Synod on the Word of God taking place in October, it seems like any issues published around this time might be the most likely place to find a review of a book by the Pope titled “God’s Word”. Many publications will capitalize on current events with themed issues.