This mysterious fairy tale, similar to a wonderful and terrible dream, was written by the Swedish writer Maria Gripe. The forests and rocks of southern Sweden told her the story of Klas and Klara, the children of a glassblower. Maria Gripe, who is no less famous in her homeland than the great Astrid Lindgren, has created a book that is compared both with the story “Ronja, the Robber’s Daughter” and with the immortal “Snow Queen.”