A reading-learning-participation book by children for children! All the letters have disappeared from Mr. Wolke's reading book: A case for the Alphabet, which immediately sets off for Himmelsburg. The detective duo M & B soon have a suspicion: All clues lead to Zappendusterhausen! There, King Xnix has banned reading and writing. But the children want to tell stories and steal the letters. Will Mr. Wolke and his friends manage to get into the well-guarded Zappendusterhausen and not only find the missing letters but also support the children against King Xnix?.