Best thing at this point would probably be to work on the things you can do to practice the stuff in the book. Show her you care, and that you can focus on her, and her needs. Find out what she really wants, whether it's help doing the dishes, or whatever, and do those things for her. And don't mention the book. When she sees your efforts, I bet it'll motivate her to read it - especially since she's already read the first chapter.
