The book describes many secrets of glass, wonderful discoveries and inventions of talented people of all countries. For more than fifty centuries, humanity is familiar with glass. And for thirty centuries, people did not even know that glass could be transparent. The optical properties of glass began to be recognized only six centuries ago. They managed to subdue the glass to the car only a few decades ago. Glass of the north and glass of the south, liquid glass, glass bricks, glass fabrics, glass, unafraid heat, enlightened optics - all these are also achievements of recent decades.