Nice book. Cover edges have light wear. Additional Details ------------------------------ Subject keyword: science fiction; apocalypse; survival; apocalyptic; thriller; fantasy; dystopia; science fiction books; sci fi; sci fi books; sci-fi; science fiction and fantasy; post-apocalyptic; sf; comet; disaster; end of the world; post-apocalypse; larry niven; sff; jerry pournelle; 20th century; disasters; near future; california; american; asteroid; 1970s; comets; fantasy science fiction; sci-fi fantasy; sf fantasy; science fiction fantasy; fantasy and science fiction; science fiction adventure; sci-fi books; literary science fiction; scifi