Moses Odinga, raised in an animal shelter in central Africa, is bracketed by a loving mother and a freebooting aunt. Charity and Prudence, divergent personalities, logically follow dissimilar life paths. Prudence's has led her from Egyptology to Europa the Jovian Satellite. In her travels, she's stumbled on artifacts indicating, finally, that human beings are not alone in the universe. The results of that discovery reach beyond nearly anyone's imagination. While Prudence struggles for recognition, and income, from her discoveries, Moses has been kidnapped, resulting in a life among vicious street children and even more vicious animals. But Moses has a talent - he can communicate with nearly everything but humans. This skill is honed as he faces increasingly difficult challenges. He develops other skills as well - notably very efficient killing ones. How useful will this secretive street urchin be in preventing a comet from doing to humanity what another did to the dinosaurs?
Building on their writings as scientists merged with their collaboration with Terry Pratchett, Stewart and Cohen have produced a gripping story. Wandering comets and near-Earth asteroids are much in the news these days. What if there's more involved than "simple" celestial mechanics? Applying their respective sciences to the fullest, the authors propose life forms in the Jovian atmosphere and unimaginable forces applied to stars, planets and moons. Comets, long considered "debris of creation" might be cast aside as thoughtlessly as any other trash. As with other rubbish tossed aside, where it lands is rarely given much thought. Cohen and Stewart use this foundation to build a structure of many aspects, each neatly supporting the others until reaching a off-beat conclusion.
In presenting their story, they indulge in what can only be labelled "post-modern' [ugh!] characterization. Charity and Prudence are distinctly different, despite being twins. Charles Dunmore is the archetypal politically successful academic. The authors spare him a formula end, but the means seems a bit thin. Angie Carver, who becomes a prop for Prudence and Moses, has built a fortune from seven husbands. While she claims to have loved them all, she mourns for none. Of all the characters, Moses, so important to the story, is constructed of implausibilities. Even the aliens are more realistically portrayed. In fact, the Elders might have been lifted straight from Pratchett's Discworld wizards. The story's scope, however, relegates most of the human characters to near-irrelevance. It is the aliens who dominate, both in assertive physical power and in personality.
There are other minor problems with this book. While the authors are strong scientists and use their experience to explain the forces involved, their retention of Imperial measurement [miles, feet] in the twenty-third century is pretty depressing. It reflects, one hopes, only current marketing realities and not future forecasting. The concept of "intelligent" atomic particles or forces is neither new nor adequately explained. A good course in cognitive studies might have helped here. This aspect of the science of the book left the ending rather limp. However, this same ending is a clarion call for a sequel to Wheelers. Look forward to it. It is likely to be rewarding. [stephen a. haines - Ottawa, Canada]