About the book: year / The stories of American science fiction writers Janet and Isaac Asimov introduce readers to the new adventures of four inseparable friends. With the help of the cheerful know-it-all robot Norby, the Wells brothers and the eldest's fiancée, Albany, travel through time and space. This time they manage to visit France in the 18th century, in the caves of the prehistoric era, and also in the distant future. And everywhere unusual events await them, often thanks to the “surprises” of the great confused Norby.