Part of a trilogy (Mag Force 7): The Knights of the Black Earth, Robot Blues, and Hung Out.Hung Out is a bit of a weak entry.Knights is good, a little better if you read Margaret's Star of the Guardian trilogy (later she added a forth, which is marginal). Star is a dark story (single story broke into three books), like King Arthur story (actually, it is the King Arthur story to an extent.)Each book is self contained, but reading in order is always better.Robot Blues starts with a museum curator wanting an ancient artifact that turns out to be a robot. Mag Force 7 thinks it is easy money. Of course, it isn't.Between an alien force bent on human destruction and the robot turning out to be very dangerous, that continues its mission, which is not what anyone wants but itself, life gets very complicated.I exchanged some email with Margaret, she puts in the character and humor (and lots of both) and her husband (Don Perrin, the co-writer) has military background and puts in the action scenes (lots of that too).Just re-read Robot Blues (29 Jun 2009).It does have a very strong story and lots of humor. It also has a hedonistic character and a one that was a man, but is now a woman. Fortunately not enough detail to make it an R rated book.