Readers learn the value of knowing how to read maps in this resourceful text about a fascinating subject. Maps of oceans reveal important details about a part of the planet humans still know so little about. As readers learn about the creation and interpretation of maps of the ocean, they're introduced to essential science curriculum topics in a fun way. In addition to the accessible and age-appropriate main text, useful diagrams and graphic organizers, informational fact boxes, a detailed glossary, and stunning visual examples of maps spark readers' interest in looking more closely at the world's oceans.