“Fans of tangled plots, detailed settings and taut adventure will have a great time with Nebula Award-winner Sheffield’s follow-up to Cold as Ice…the world he creates seems imminently possible, and his characters, especially Millie and Bat, are portrayed with humor as well as the intellectual rigor demanded by a hard sf plot.” —Publishers Weekly

“Sheffield leads us through the book with his usual wit, impeccable science, and command of the language. It is hard to think of anybody who is writing hard sf these days substantially better than he is.” —Booklist