Sadly, Throy doesn't live up to its predecessors, Araminta Station and Ecce and Old Earth. It's still Vance, and therefore a fun read. But he doesn't seem to have put much effort into this book, which seems a somewhat half-hearted effort to tie up loose ends. There's not a lot of mystery, and the expected resolution comes about, though with more callous bloodshed than one might anticipate.
All in all, a decent and readable book. Definitely worth reading to finish up the series, but otherwise not interesting enough to be one of Vance's best.