About the book: 1990 / A huge ring of obviously artificial origin revolves around a star. Under the influence of centrifugal force, there is a semblance of gravity on its inner side. On the same side there is the atmosphere, oceans in which an entire planet could float, mountains, forests, etc. To study this phenomenon, an expedition is assembled, consisting of two earthlings, their former enemy, and a representative of a supercivilization suffering from all kinds of phobias. On the newest starship they set off to explore the Ring World, but everything went wrong…