Reddit reviews Rules for a Knight

M30 here
I remember when I had the same issue, I got a book on the history of the Samurai. I brought a highlighter and sticky notes to a cafe and tabbed the hell out of that book. I noted every clan, every distinction of the clan, famous swordmakers, beheading "showings". I took to those stories to heart. Those men exhibited such amazing discipline that I wanted to follow suit.

Aaaaaaand, when I met up with the chick, i would have the book in my bag. Eventually, she saw the book that was tabbed to hell. BOOM. She thought that was sexy as hell (don't stage it/force her to see it). She KNOWS that you have greater ambitions in life. That is pure catnip. ~10 years later and I still have that book. She isn't around, but that book is, and it is still catnip.

The trick is to maintaining a schedule time to devour the book. When she asks to hang out during that time (and she will target that time), tell her that you are a bit busy during that scheduled time. Say, "How about afterwards?"

Other good books about discipline:

Rules for a Knight

Man's search for meaning

Also, turn off your ringer/vibrate on your phone. Put that phone in a backpack. It took me until 23 to figure that one out. Ignore the phone. Why does she need an immediate response? She doesn't.
If she gets frustrated, she will take it out on you sexually. No joke. She will fight for your attention. Just keep up with that book. Even if you do get your intended reaction from her. You put that book down and you'll be worried all over again. Not fun, is it?

If she is really young, she might try to make you jealous. If that is the case, she is bad news. I doubt that you will get here, but it is a red flag to remember. Find another girl who will see that tabbed book. Profit$$$

Here you go

Rules for a Knight by Ethan Hawke

Also The Moon Is a Harsh Mistress and it is excellent!