Amazon.com (ISBN 0345430794, Hardcover)

Award-winning author Stephen Baxter turns to the origin of species in this final novel of the Manifold trilogy. Reid Malenfant and Emma Stoney are flying over Africa when a new moon appears in the sky--and Emma disappears. She finds herself on the Red Moon with people resembling human evolutionary ancestors, with whom she must learn to live in order to survive. On Earth, Malenfant teams with Japanese scientist Nemoto on a desperate rescue mission that leads to greater questions about the origin of the alien moon, and ultimately of humankind.

Because the Manifold novels take place in alternate universes, Origin works well as a stand-alone read. Baxter effectively explores how modern humans and their ancestors might be thoroughly alien to one another, but the book is more focused on thoughtful scientific speculation than in-depth characterization. However, readers who are swept away by novels of cosmic scope and compelling imagination will find Big Idea science fiction at its best. --Roz Genessee