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Dolphie is happy because he has just turned seven! However, at night his body suddenly becomes covered with white fur, claws grow on his arms and legs, and a real tail appears. What happened? Is he really a wolf cub? But he doesn't want to be! But his brother Timmy convinces Dolphie that it's cool.

The brothers plunged into incredible adventures, but Dolphie was worried that his parents would not find out about his transformation. He thought that they would not love him then. In addition, the wolf with glasses is hunted by an evil neighbour andcollectors of rare animals.

Will Dolphie manage to escape from his pursuers, who will be the mysterious gentleman in the hat and will his parents find out about his secret - read the first book in the series about Dolphie the Wolf by the Dutch writer Paul van Loon.