Mark Leiren-Young is an award-winning author, screenwriter, playwright and filmmaker. He has written TV shows for young viewers (including cartoons) for Netflix, CBC, ABC, BBC Kids and PBS. He wrote, directed and produced the award-winning documentary The Hundred-Year-Old Whale . His first book, The Killer Whale Who Changed the World , won a Science Writers and Communicators of Canada Award. Mark has also written several books for young readers, including Sharks Forever: The Mystery and History of the Planet's Perfect Predator and Orcas Everywhere: The Mystery and History of Killer Whales, which was shortlisted for a Red Cedar Book Award and the Information Book Award, and won the City of Victoria Children's Book Prize. Mark hosts the podcast Skaana about ocean stories and is actively involved in the fight for the survival of the endangered southern resident orcas. He lives in Victoria, British Columbia.