This was an amazing book in many, many ways. First, I am in awe of Kim Stanley Robinson's ranging imagination from depicting life on Mercury and a cult of sun walkers who follow the sun around the planet, always keeping in the shade, to the body surfing in the rings of Saturn. This book reminded more more in its scope and character depth of Years of Rice and Salt, though the setting and premise of both books are very, very different. Robinson has a range that I think most writers dream about achieving but he moves with confidence and intelligence between realms of space travel to botany to genetics. The character Swan is flawed but also wonderful in her naive embracing of people and of the different worlds. She is an adventurer, trying anything and everything, going to extremes, and it takes the death of her beloved grandmother to bring her life more into focus. She gets involved in her grandmother's work although her grandmother had not trusted her enough to tell her what it is. The messenger of information that she doesn't understand, Swan becomes wrapped up in an inter-planetary conspiracy involving quantum computers, revolution, and the fate of several cities on different planets.I don't think a review can do justice to this book--there are just too many beautiful layers to explore within in it to capture in any summary. If you want to travel to other worlds and imagine a future where humans populate much of our solar system while still trying to work our political differences and fights over resources, settle in for an amazing journey.