The Hydrogen Sonata by Iain M. Banks

Whichever book ended up being the last stop in my meandering progress through the SF novels of Iain M. Banks--a journey that began nearly ten years ago--it was bound to be a bittersweet experience.  That that book has ended up being The Hydrogen Sonata only makes it more so.  Banks could not have known, when he sat down to write this novel, how little time he had left, or that it would turn out