You very quickly realize this is an usual book when you start to read it and notice that it's written in first person PRESENT. ("I walk across the room and sit down by my computer.") Very very few works of fiction are written in that case, but it has the effect of making the action sequences much more immediate and exciting.
This is a "first contact" science fiction novel, as well as one of those "okay, so how do YOU define sentience?" explorations. But unlike, say, H. Beam Piper's "Fuzzy" books, this one doesn't spend a lot of time in a courtroom arguing the issue. At first I wasn't sure about the lead character -- she STARTS OFF the book talking about a murder she's just committed, and about several more that she's planning on very soon. But (spoiler?) eventually she comes to realize that the universe is bigger than her or her desires or her hatreds, and that's important. The book does leave you with several background questions -- like, what IS the stated purpose of this corporation our hero works for, and how did it come to have such seemingly-limitless resources? Oh, by the way -- it's fun to read older SF books and see how the world has changed science fiction. This book was written in the 90's. It's set "in the far future" -- and faxing is still a big thing in it.
The aliens in this book are universally well-presented and interesting, both as species and as individual characters, which is always a plus for me.