Kate Messner and Christopher Silas Neal’s latest Over and Under story explores the ocean ecosystem. Narrated in the first person by a child while out rowing with their family, we encounter sea lions sunning on the rocks, birds soaring overhead, and a mother and baby otter cuddling among the kelp. A glimpse below the water reveals an entirely different, bustling world: shimmering fish and bristly urchins; lurking eels and drifting jellies, and a giant surprise! There’s a sense of wonder in Messner’s storytelling, beautifully translated by Neal, who creates spread after spread of mixed media realistic ocean life. The family is present only to help place the reader in the story; nature takes center stage, with the human characters occasionally appearing from the side of the spread, or from far above to provide perspective. Endpapers show sea stars, fish, and shells in white silhouette across a field of deep blue. An author’s note describes Messner’s inspiration for the tale, and an “About the Animals” section provides a brief informational paragraph on each animal in the story. Recommended books and websites direct readers to further reading. A thoughtful meditation on the ocean, and an excellent addition to both this series and STEM/STEAM and nature collections.