Some years ago I've read an excerpt from a sci-fi book, I don't remember the name or the author, just the premise. I'd really like to find it now. What is the name/author of the book described below?
It's billions of years in the future, human race (apparently) has long time since left Earth and relocated somewhere. Sun is expanding and will eath Earth soon. The last colony of vampires is barely surviving underground, keeping a (relatively) small number of humans for a food source.
Most of the vamps have been around for billions of years themselves, they know their time is ending and many of them are quite depressed and tired of "living" anyway.