Very interesting scenario: A group of religious 'rulers' giving personalized gifts to a group of secular 'rulers'. Peer to peer gift giving or 'gifts among equals' is the impression that I take away from this encounter.
Interestingly enough, it can be considered poor manners to give a book as a gift under the wrong circumstances:
Top 10 Times Not to Give a Book by Beth Carswell, AbeBooks.com
10. You don't know them well enough. Period.
Rule of thumb: If you don't really know someone, you can't know their taste, so even a book you adored may be inappropriate.
It would seem to me highly unlikely that any of the Governing Body(tm) members were on a first name basis or were personal friends of any of these politicians. Hence, if some of the politicians did not believe in the Bible, giving one as a gift could have done more harm than good.