Harriet Ziefert: Harriet Ziefert is the acclaimed author of over 300 books for children. Never having seen one in her husband's medical offices, Ms. Ziefert knows that hippos do not go to the doctor. She also knows about kids and non-fiction, having earned a master's degree in education from New York University. As an educator, Harriet was among the founding pioneers in the development and teaching of what today is known as the Common Core Curriculum. She is also the visionary founder of Blue Apple Books.

Emily Bolam: Emily Bolam studied illustration at England's Brighton College of Art. Her first idea for a children's book began as a college project and was published upon her graduation. Since then, Emily has illustrated over a hundred books for children. In their 20-year collaboration, Emily has sometimes traveled to Blue Apple's New Jersey offices to partner-in-person with Harriet on dozens of entertaining and informative books for kids.