In this follow-up to the Book of the New Sun, Severian, the Autarch of the Commonwealth of Urth, journeys deep into space. His goal is to acquire the New Sun, a star/energy source/person (or perhaps all of these), which is capable of replacing his planet's dying sun. While his success will ensure the survival of his planet, it carries with it a terrible price.

Much like the preceding four volumes that comprise The Book of the New Sun, I enjoyed this book but I do not feel like I entirely comprehended it. The imagery throughout the book is fanciful and layered. The narrative also has a mythic cast that reminded me a bit of Frank Herbert's Dune Messiah. Wolfe was apparently a devout Catholic and allusions are hidden in the text, but the alienness of the characters and events makes the story feel closer to esoteric Eastern mysticism than familiar Christian biblical scripture.

Adding more layers to the puzzle is the fact that Severian has absorbed the memories (and perhaps identities) of previous Autarchs, his interstellar journey appears to involve time dilation, and even after returning to Urth he encounters and reunites with various characters at different non-chronological points in their lives.

Not only is the story dense and cryptic, it is related by a narrator who is both unreliable and somewhat aloof from events. The reader is often told that he wept or contemplated suicide after some bleak or unexpected turn of events, but everything is related with a baffling degree of clinical dispassion. Severian is basically a messiah figure, but one that is not to be entirely trusted.

Whether or not a reader will enjoy this book depends a great deal on their tolerance for confusion. If vaguery and cryptic dialogue aren't turn-offs, there's a lot to enjoy here. And if you like re-reading and puzzle-solving, this series rewards it. But be certain to read this book soon after The Book of the New Sun, when it's fresh in your mind.