It’s really in three parts. The first part, and introduction, kind of gives you her background, an overview of what she is setting out to do, and her basic theory of romance writing (i.e. that there are levels and you have start with a lower intimacy level and then ratchet it up as you go, for example.)
The second, longest part, is her actual novel, Acting Married, interspersed with meta commentary about how she is providing the Hero with becoming a better guy character arc and each heightening of intimacy and pull back. This part was interesting (I’m an intermediate writer who started off in SF/F and so picked this up to dig deeper into romance tropes) and probably would be more useful for beginner/intermediate writers. After about two thirds of the way through this part I sort of stopped reading the Acting Married parts and skipped to her commentary. It got a bit long as most of it boiled down to “and here I have her pull back because I’m only halfway through the book.”
The third part was the most fun. It’s a list of bunch of Romance tropes (Bad Boy, childhood sweetheart, kidnapped woman, fake marriage, etc) with Lieske’s commentary about how it provides conflict or how it might interact with other tropes. Very cool. Probably the most overall useful part of the book for what I was personally looking for.
So not a useful for more advanced writers, but kind of a cool reference for any level.