Tower of Glass

Simeon Krug is a man with a vision, and he has the vast wealth necessary to bring it into being. For Krug wishes to communicate with the stars, to answer signals from deep space.
The colossal glass tower that he is building for the purpose soars high above the Arctic tundra, a sparkling monument to his determination and obsession. The androids who are working on it are perfect synthetic creations, created by Krug's own process in Krug's own factories, and their commitment to the project and their loyalty to Krug are beyond question. For they have made him their god and believe that through him they will become flesh and blood.
But Krug is not a god, and when the androids learn the bitter truth their anger is terrible and uncontrollable and threatens much more than Krug's tower.
Tower of Glass is a tense and powerful novel written with the intense creativity and ferocious imagination which characterize Silverberg's finest work . Dealing intelligently and forthrightly with important themes, it is science fiction at its thrilling best.