Matter
In a distant-future human-machine symbiotic society of seemingly unlimited technological capability, the Culture is threatened by ongoing wars, political upheavals, and alien intruders, in the first volume of a science fiction trilogy by the author of The Wasp Factory. 20,000 first printing.
Reviews

Cindy Lieberman@chicindy
3.5 Not my favorite Culture book (that would be "Player of Games"). Interesting concepts and scenarios, but a slower read than most. Character-wise not much except for Ferbin and Holse's relationship.