A) Chronos is right. Rue is thinking of Cat.
B) Ethilrist: If I understood your question (I think you dropped a word or two
) No. But some of the events in Cat overlap the events of Sunset (IIRC) and Number. (We see a scene in Number and then see it again in Sunset, but this time, from Maureen’s point of view.
And for the record, I disagree with Chronos. I think he’s underrating some the post-Moon is a Harsh Mistress Heinlein stories. A few of Heinlein’s later works are really good. A few are flawed but good and a few…um…well…ugh.
A quick rundown, IMHO, of course
Bad
I Will Fear No Evil He wrote it when suffering from a near-fatal medical condition and it was released unedited. Heinlein was noted for writing down a ton more than he would eventually release and then edit it down. It shows that he didn’t.
Number of the Beast I read a theory that this was supposed to be a parody. Having reread it with that in mind, I still didn’t like it and don’t buy the theory. And even if it was, who cared? Outside of the Oz sequence and the cocktail party at the end, I disliked most of it and hated the rest.
The Cat Who Walks Through Walls I HATED the ending, I hated the middle and I hated the fact that I liked the beginning a lot and then it was ruined by being connected to the middle and last parts. On the other hand, it kinda pisses libertarians off as Heinlein shows what happens when the neat, tidy theory of libertarian philosophy encounters messy, imperfect ol’ humans. 
Good
Job Thoughtful, great characteriztion, good philosophical musings, no connection (except as a barely noticed in-joke) with any of Heinlein’s other works. This is the late-period Heinlein’s masterpiece.
To Sail Beyond the Sunset A)It’s a fascinating picture of early 1900s life from someone who was there. B) Don’t tell me you didn’t get a thrill when you started seeing Maureen encounter the events of the early future history short stories. C) Ok, the ending’s not perfect, but it wrapped things up.
Time Enough For Love (This should be in the “Flawed” category, but it has The Tale of the Adopted Daughter and The Man Who Was Too Lazy to Fail, which bump the book up a notch, even though there are some pretty snoozeworthy sections)
FTR, I regularly reread Job, I reread Sunset every now and then, and I regularly reread a “the good parts version” of Time Enough
Flawed
Friday: The plot meanders, the character’s annoying and the world doesn’t make much sense. But it’s fun and the plot (such as it is) moves right along.
Fenris