loving this book!
I have read several of James Alan Gardner's books (and re-read most of them) but this one is a little more humorous than the others. How could it not be when told from the perspective of Oar - an almost alien, almost human, see-through, not-quite-glass, nearly immortal woman that has great intelligence but no "social skills" due to a lack of interaction with any other people than her sister and buildings full of basically comatose individuals with Tired Brain syndrome during her formative years ?
It helps to have read Expendable to get the back story, but it will work as a stand alone book. I have not read this series in order (I actually read Commitment Hour first), but they all work as stand alone books with extra perspective added by each of the books in the group (it is more a group of books written in the same universe, with some characters that show up in more than one book, than it is a series).
If you enjoy science fiction with a strong bent towards humor you will like this book. If you like getting a glimpse into a possible future where humans are most definitely not the toughest kid on the block, you will like this book. If you enjoy reading something that has a bit of adventure, and a bit of interpersonal relationships without going all mushy, and a bit of mystery (mostly about superior alien races), you will like this book.
If you don't like any of those things - you may still like it just for the humor!