Nancy Krulik has written over one hundred books for children and young adults, including two New York Times bestsellers. Her very first story (in first grade) was about how she wanted to be Mary Poppins because she wanted to dance in the park with Bert and the penguins. Follow Nancy on Twitter at @Nancykrulik Sebastien Braun studied fine and applied arts at Strasbourg University. He began his career teaching art, but when he moved to London in 2000, he started to illustrate children's books and has been working on picture books ever since.