> Almost last page: Oh, here's a cat, it walks through walls. I got a rather late start > on those books, as I couldn't buy a book titled "The Number of the Beast" until I had > gotten away from home.
I thought "The Cat who Walks Through Walls" had an unsatisfying ending. I know that Heinlein was trying to go for a Schrödinger's cat kind of thing, which I respect and it was interesting, but kind of left you hanging. I guess that was kind of the point though.
Incidentally, the ending to "The Cat who Walks Through Walls" links it to pivotal events that happen in "The Moon is a Harsh Mistress" so I recommend that you read that one first.