John Marsden is an Australian author known for his young adult fiction. He gained fame with his novel series, Tomorrow, When the War Began, which explores themes of survival and resilience in a war-torn Australia. Marsden's writing often addresses complex social issues, making his work both engaging and thought-provoking for young readers. In addition to being an author, Marsden is also an educator and has worked as a teacher. He founded Kangaroo Valley School, which emphasizes creativity and critical thinking. His contributions to literature and education have made him a significant figure in Australian culture.