Uh, not to be picky or anything, but unless one goes to the Children's Section or the Nancy Reagan section on the NEXT PAGE, Rudy's book IS (with one exception) the ONLY book sold at the Reagan Library Gift Shop that doesn't pertain to Reagan himself, a book his son wrote, or about presidential planes or ships.
I know you don't like that little fact, but deal with it.
As to who chose the book, I'm quite sure that there is a Board in charge of selecting which books or people Reagan would approve of or who he respected.
And since Reagan chose Rudy for his #3 slot at DOJ, I think we can see that he trusted Rudy.
Holy poltergeist, Batman!