Children’s nonfiction books can be powerful tools for cultivating Ocean Literacy, shaping young readers’ understanding of marine science, and empowering them to take actions to become Ocean stewards. This chapter explores how children’s nonfiction serves as immersive educational resources, bridging fact-based information with engaging narratives that foster critical and creative thinking. Through meticulously researched content, vivid storytelling, and engaging illustrations, children’s nonfiction brings Ocean science to life, allowing readers to grasp complex ecological processes and recognize their roles in preserving Ocean health. This chapter highlights how these books support layered learning experiences that are accessible and inspiring. Additionally, it addresses the role of nonfiction in mitigating eco-anxiety by providing hope and agency through stories of positive change and action. The chapter ends by offering several tips to help educators, librarians, parents and guardians select quality nonfiction books. Through these insights, the chapter serves to illuminate the unique ability of children’s nonfiction books to inform, engage, and inspire the next generation of Ocean-literate, environmentally conscious citizens.