This book is one of my favourites and I have read it a number of times. I love the characters, the world and I found the book to be deeply atmospheric.
The book follows an expedition to a comet that turns out to be much much more. While the world starts out not too futuristic, it evolves into something far, far weirder. The final world described rivals even Larry Niven at his best and weirdest.
It is excellent, atmospheric, weird with a good does of action. It's mystical in a certain way I cant describe, and the ending is excellent.
While I love this book, I will warn people that because it is hard 'Sci-Fi' it may not be for every ones taste. This book is a masterpiece, but it may not be easy reading. I have given this book to a few of my friends and none of them have ever successfully got into it. This
If you like hard sci-fi, and you have read a lot of serious sci-fi, this is recommended. But beware that this is not all that it seems, and some people may find it hard going, especially if you are after easy reading.
In Summary, this book is highly recommended.