Answer
First thing is, the person's execution of devotional service begins by buying the book. And as you said, even if they don't read it, their children may read it; somebody will read it.
All those who have read Prabhupada's books did not necessarily purchase them directly. I read Prabhupada's books in a library. I didn't purchase them; the library purchased them. Correct? Some devotee went and sold the books to the library, and then I read them.
Many devotees did not buy the books themselves. Perhaps their parents or somebody else got them. The books were lying there, they read them, and they came to Krishna consciousness.
So these are the examples we should give: Krishna has His own plan for how to reach Bhagavad-gita to His devotees. Even though somebody may not be ready to become a devotee, he gives some credit by buying the book. He goes, gives it and keeps it at home, and his son, relative, or somebody else may read it and become a devotee.
So Krishna had planned right from the beginning to reach that Gita to that devotee. He gave it through this devotee, through this particular person. Krishna is in control because Krishna says that He sits in our heart and continuously monitors our desires—whether we are fed up with this material world, whether we want to rejoin Him and feel complete or not.
He is just waiting, and He directs us.
So, again, we have to keep on doing our duty—to go on trying to distribute Prabhupada's books to as many living entities as possible. Why should we worry about whether someone will buy it or not, or whether he has the qualification to read Bhagavad-gita or not? All these are concoctions.
Krishna is waiting for everybody. How have all of us come to Prabhupada? The Lord in the heart guided us through various things. It is not all an accident. These are not accidents.