I have not read or seen this book, however, I did get hold of the commentary written by the Protestant theologian William Barclay on the Book of Revelation. He also takes this view about the Book of Revelation, that it was written prior to the Fall of Jerusalem, and not during the later period as we have been led to believe. I am tending towards this view, as well as the view that Nero is 666.
If the book is a response to the Left Behind Series, and there are Catholics who have been taken in by this stuff, then I think the book has merit, regardless of whether it is written by a Catholic or Protestant.
There are two more books that could be added to the bookshelf, the one written by Paul Thigpen “The Rapture Trap” and the book written by David Currie as a refutation of the false doctrine of the Rapture.