The Book of the Short Sun is (we are told) narrated by Horn, who was born on the generation ship called the Long Sun Whorl, and who was a teenaged boy during the events of The Book of the Long Sun. At the time of this new series, he has lived on the planet Blue for something over 20 years. He has a wife and three sons, and he is a papermaker. Blue is one of two twin planets, the other called Green, to which the generation ship brought many colonists from Earth. On Blue's Waters told the story of his quest for the city of Pajarocu, which had a still-functional lander (a "shuttle" capable of interplanetary flight), in which he hoped to return to the Long Sun Whorl and find his beloved teacher, Patera Silk, the hero of The Book of the Long Sun, whom he hopes will restore order to the decaying society of his colony city, New Viron. At the end of that book, Horn and his estranged son Sinew were on the lander, ready to take off.

As the title of the new book hints, the lander did not make it to the Long Sun Whorl, but rather was diverted to Green. Green is the home of the blood-drinking, shape-changing, inhumi, creatures who seem to take on the characteristics of their prey. (Some inhumi have infested Blue, including a young male whom Horn "adopts" in the first book, but they are more numerous on Green, and they seem to keep human slaves.) Both books are narrated after Horn returned to Blue from Green, however. And the Horn who returned seems oddly different. He has all Horn's memories, but some others as well, and he has changed physically. This was clear in On Blue's Waters, but is made much clearer in In Green's Jungles, and there are many hints as to what or who Horn might now be, though no answers are given. The story in both books is told on parallel tracks: one revealing ongoing "present time" events on Blue after Horn's return, and another consisting of a book that Horn is writing as we are reading it, more or less. Especially in the latest book, the narrative is thus intricately structured, and Wolfe uses this structure to considerable effect.

Horn has left the town of Gaon, where he was acting as Rajan, the ruler, during the first book, and he has come to a town called Blanko. His appearance, and his companion, the talking bird Oreb (who was Patera Silk's bird in the The Book of the Long Sun), cause people to regard him as a strego, or magician. He is taken in by the leading farmer of this city, who is trying to prepare for an invasion by a neighbouring city. Horn befriends this family, and eventually helps prepare their defence. At the same time he is continuing to write his account, which includes some stories of his terrible time on Green, where he is imprisoned by the inhumi, but with the apparent help of the previous natives of Blue, the Vanished People, he manages to escape only to lose both his real son, Sinew, and his adopted son, the inhumu Krait, and eventually, it seems, his life. But he is not dead. This story is intertwined with tales told by his host, Inclito, his host's mother, who recalls life in the Long Sun Whorl, and by Inclito's teenaged daughter Mora and her friend Fava.

All these strands weave together in a complex way, answering some questions but suggesting many more about the relationship between humans, inhumi, and the mysterious Vanished People, who may still be present in some form. Horn has developed a mysterious power of "dream travel," which takes the characters to Green on occasion, and even to the "Red Sun Whorl," which a reader of the first series will recognize as Urth at the time of The Book of the New Sun.

As I said, the story is mesmerizing. The mysteries are fascinating and seem significant. But it's hard to make a final judgment, because this is only the middle volume of the story. Nonetheless, I can say that I am eagerly awaiting the final volume. This trilogy has a chance to be magnificent. Wolfe's regular readers will not be disappointed by the story so far, and as for those who have yet to discover Wolfe, do yourself a favour and give his work a try.