Sam,

You say you formulate 10 questions per book on average.

If you're doing that right from the start... overkill, mate. You're missing opportunities. Think of yourself as a reporter. You're asking this authority on a topic some questions to suit your purpose (whatever that might be.) 3 questions and your purpose in mind should be enough to get you interacting.

So you got this expert in front of you they answer your first question. What happens next? Usually you get insights that lead to other questions. They are probably better formed than if you had a list of ten questions.You're having a conversation with an author and your job is to fulfil your purpose. Everything else this person knows is redundant for now. However finding out how informed this person is might give you another purpose or two.

You're approaching the books with a limited channel. Allow yourself to be more flexible and please. Do more activation layer so the book fully gels.

It's would be good if you fully activated those 11 books however I think you're stopping short. How do you know when you're done with a book? Same as when you found your glasses. They are in the last place you look once you have it you cannot look any further because you've got it. If you haven't got it with the book yet. Do another activation pass or 4.

Alex