What Books Do You Own?

JivinJ links to a WaPo profile of Marjorie Dannenfelser of the Susan B. Anthony List in which Jason Horowitz writes:

Dannenfelser, wearing a striped beige jacket and a necklace of silver spheres, came out of her small office, where books about the importance of women in the life of Pope John Paul II ("Wojtyla's Women") and an anti-Democratic screed ("The Party of Death") sat in a short bookcase.

I do not wish to discuss here the merits of either book mentioned (in part because I haven't read them).

But it seems odd that this detail even warrants a mention. What's the implication? Is it that if someone has a book in her bookcase, that she therefore presumably agrees with all (or at least most) of the arguments its author makes therein?

Personally, I think that when someone owns a book, it means that person owns a book, and any further extrapolation by someone else is made at his own peril.