CRAIG FOSTER is one of the world's leading natural history filmmakers and co-founder of the Sea Change Project. His Academy Award-winning film, My Octopus Teacher, follows the story of his year with a wild octopus, at the same time honouring his pact to dive every day for a year. This is his fourth book. ROSS FRYLINCK is a writer and photographer, and a former commissioning editor at Cambridge University Press. He has been working for ocean conservation for the past fifteen years, and is co-founder of the Sea Change Project.