Excellent read with a twist
Begins with the much used "a stranger gets killed" thread on a space station. Great characters, locale, and plot. But it seems like Mr. H. combined two ideas into one novel, as if he had the second part ready as a follow up to "The Moon is a Harsh Mistress", then tacked it onto the plot already running through his head.
Any way you look at it, the Master made it work! I would recommend reading "...Mistress" first, to get a feel for the story line he brings into "The Cat...".
As with all his books, this is timeless. I've reread these and all his others at least a dozen times. They never get old, in between readings they're like a best friend you haven't seen for awhile, and look forward to catching up with.