Joanne Mattern is an American author who has written over 350 books for children and young adults. She specializes in nonfiction topics ranging from animals and nature to history and biographies. Mattern's work often finds a place in educational settings, serving as resource material for students and teachers. With a clear and engaging writing style, she is adept at making complex subjects accessible and interesting to young readers. Her books include titles like "Thank You, Dr. Martin Luther King, Jr.!" and "Harriet Tubman: Leading the Way to Freedom," which showcase her ability to cover important figures and events in a way that is both informative and inspiring.