An enjoyable, quick reading sci-fi story, like something Peter Watts might write on ecstasy. The story starts on Ganymede in the years after a nanotech accident(?) caused rainbow-goo to consume the inner solar system. We follow the protagonist as he takes an experimental ship from the sterile outer system, to the fecund mid-system settlements, and finally into the hot zones where the sun fuels a continual seethe of amok nanotech. Despite the post apocalyptic setting, the story never really feels dark, and I generally liked the hardworking, moderately neurotic, Swedish survivors who populate the outer system.
The book does many things right. The descriptions of the nanotech gone amok (aka blooms) are engaging, and often convey a pleasantly techno-Lovecraft vibe, complete with bloom cultists. Other physical and cultural descriptions are well done and steadily interesting. In general the world building is reasonable, occasionally clever, and doesn't push you away from the story. The finale isn't anything unexpected or ground breaking, but the intervening journey is enjoyable.