Hamster Bertram is taking off. Hamster Bertram is in luck! Recently, he has been teaching the little mouse Edwiga and her siblings how to read. Those who can read can recognize many dangers that lurk in the human world for small and large rodents. News of Hamster Bertram's lessons spreads like wildfire, and soon the animals in the harbor district are lining up outside the muscle mice's quarters. But when the shady wandering rat Wendolin appears, everything spirals out of control. Hamster Bertram's fame goes to his head - Pomme de Terre, Picandou, and Gruyère can hardly recognize their friend anymore. Has the hamster really forgotten who his true friends are? A new adventure in the successful Muscle Mice series in a small format with shorter stories for reading aloud from age 5 and for first-time independent reading from age 7! With wonderfully humorous illustrations by the author Ute Krause. Other volumes in the series: The Muscle Mice - Picandou and the Little Screamer; The Muscle Mice - Hamster Bertram Lives Dangerously; The Muscle Mice - Pomme de Terre and the Forty Robbers; The Muscle Mice and the Rat-tastic Party.