0440108217 light creasing, edge wear; Two Novels in One: Legacy by Joan D. Vinge - Dartagnan licked enough boots to outfit a centipede in pursuit of his one big chance - then, on a frozen outpost of Heaven Belt, he was asked to throw it all away... for someone else's doomed dream. The Janus Equation by Steven G. SPruill - Essian's work could change the future - and the past - and to capture it, the world's largest corporations pursued him with bribes... and with killers. But the secret of the Janus Equation was far more fateful than Essian dared to conceive...