This is one of my favourite all time SF books and I'd recommend it to anybody.
It all takes place billions of years into our future, when humans are brought back to life to serve as bait for horrific vampire-like spiders called Zotl. The story follows the human's reannimator Gai, a god like being who has created worlds for us to populate. It also follows the lives of some of those humans over thousands of years of real time, while events for Gai fly past in a matter of days.
I have read very few books that manage to convey the sense of time that Attanasio cojures up in this story; as he follows the humans' first desperate battles for survival, through the centuries of opulence and into final decay.
If you like SF, then buy this book.