What’s the difference between an absorbing adventure and a disappointing effort? Since it’s in the mind of the reader, some may welcome DiTerlizzi’s latest with open arms. Others will be frustrated that awkward word choices, inconsistent voice, lengthy descriptions and a heavy-handed environmental agenda obscure the author’s usually inventive imagination and squander the appeal of the frankly beautiful, carefully designed illustrations. All of the elements for a fascinating tale are here: the solitary child, Eva Nine, apparently the only human in the world; trusty companions (Eva's robot Muthr, Rovender Kitt, an alien blue creature who is utterly charming but decidedly adult in his concerns and back story, and Otto, an animal who communicates telepathically with Eva); a quest (to search for other signs of human life and discover the meaning of a mysterious scrap of paper); and, of course, a brutish villain, Besteel, who threatens them all with capture and death. Unfortunately, while the sprawling plot offers plenty of action, stilted language distances readers, the final reveal is utterly clichéd and the shameless cliffhanger is more likely to exasperate than entice. (Science fiction. 10-14)