Antarctica's most defining characteristic is that it follows on the heels of Robinson's Mars trilogy, which is some of the best science fiction anywhere. Unfortunately, this means the book has some enormous shoes to fill; and my rating is more a reflection of the fact that Robinson's narrative style, structure, and tactics are all quite familiar but are committed to a story whose scale and grandeur are considerably less than his previous work. The characters will be familiar to anyone who has read the Mars books, but they don't resonate the same way. Robinson has clearly done his homework on Antarctica, but the science, characters, and story aren't blended into the same kind of cohesive whole that so distinguishes the Mars books. Also, the recounting of early explorers' exploits and endurance is a bit volumous for my taste. The story principally follows two social misfits who have found themselves in the fledgling Antarctic society of the early twenty-first century and a Congressional aide has been sent by a forward-looking senator who wants to understand events unfolding at the bottom of the world. As is customary for Robinson's work, the narrative is stuffed with relevant science. Robinson uses the characters to show the reader what Antarctica is like, physically and socially. The plot climax and resolution are good but lack the drama of Robinson's earlier work. This book would be a good warm-up for someone who hasn't read the Mars books yet.