Sorry mate, In the nicest possible fashion: I sometimes get the impression that you belong to the "Thou Shalt Have A Glass Mirror All The Days Of Your Life And Non-other" school.
The problem with a glass mirror, as I understand it, is that they are:
1) Expensive.
2) Breakable.
3) Difficult to obtain.
4) Heavy.
In an ideal world we would have a mirror that has the optical purity of glass with the durability of the Star Flash.
There is also the issue of range. If it's for use at sea, Yes. For use on land, No. Range is comparitivley short on land. Unless it's a desert or arctic enviroment.
I would be inclined to beg, borrow or steal a copy of his book, read it and then pass judgement.
I wonder if he would be willing to have the book peer reviewed before publication?