New friends Nilly and Lisa help eccentric professor Doctor Proctor to develop his latest invention, a powder that makes one fart, making them very popular at school, but someone is planning to steal the industrial-strength formula for evil purposes.
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Series
5 primary booksDoktor Proktor is a 5-book series with 5 primary works first released in 2007 with contributions by Jo Nesbø and Tara F. Chace.
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